Dr. MJ Bazos MD,
Patient Handout
Chronic
Pain: Hope Through Research
What was the worst pain you can remember? Was it
the time you scratched the cornea of your eye? Was it a kidney stone?
Childbirth? Rare is the person who has not experienced some beyond-belief
episode of pain and misery. Mercifully, relief finally came. Your eye healed,
the stone was passed, the baby born. In each of those cases pain flared up in
response to a known cause. With treatment, or with the body's healing powers
alone, you got better and the pain went away. Doctors call that kind of pain
acute pain. It is a normal sensation triggered in the nervous system to alert
you to possible injury and the need to take care of yourself.
Chronic pain is different. Chronic
pain persists. Fiendishly, uselessly, pain signals keep firing in the nervous
system for weeks, months, even years. There may have been an initial mishap-a
sprained back, a serious infection-from which you've long since recovered. There
may be an ongoing cause of pain-arthritis, cancer, ear infection. But some
people suffer chronic pain in the absence of any past injury or evidence of body
damage. Whatever the cause, chronic pain is real, unremitting, and
demoralizing—the kind of pain New England poet Emily Dickinson had in mind
when she wrote:
Pain-has an Element of
Blank- It cannot recollect
When it
begun-or if there were
A time when it was
not
Pain's "Terrible Triad"
Pain of such proportions overwhelms
all other symptoms and becomes the problem. People so afflicted often cannot
work. Their appetite falls off. Physical activity of any kind is exhausting and
may aggravate the pain. Soon the person becomes the victim of a vicious circle
in which total preoccupation with pain leads to irritability and depression. The
sufferer can't sleep at night and the next day's weariness compounds the
problem-leading to more irritability, depression, and pain. Specialists call
that unhappy state the "terrible triad" of suffering, sleeplessness, and
sadness, a calamity that is as hard on the family as it is on the victim. The
urge to do something-anything-to stop the pain makes some patients drug
dependent and drives others to undergo repeated operations or resort to
questionable practitioners who promise quick and permanent "cures."
Many chronic pain conditions affect older
adults. Arthritis, cancer, angina-the chest-binding, breath-catching spasms of
pain associated with coronary artery disease-commonly take their greatest toll
among the middle-aged and elderly. Trigeminal neuralgia (tic douloureux) is a
recurrent, stabbing facial pain that is rare among young adults. But ask anyone
living in a community for retired persons if there are any trigeminal neuralgia
sufferers around and you are sure to hear of cases. So the fact that Americans
are living longer contributes to a widespread and growing concern about pain.
Neuroscientists share that concern. At
a time when people are living longer and painful conditions abound, the
scientists who study the brain have made landmark discoveries that are leading
to a better understanding of pain and more effective treatments.
In the forefront of pain research are
scientists supported by the National Institute of Neurological Disorders and
Stroke (NINDS), a component of the National Institutes of Health (NIH). Other
institutes at NIH that support pain research include the National Institute of
Dental Research (NIDR), the National Cancer Institute (NCI), the National
Institute of Nursing Research (NINR), the National Institute on Drug Abuse
(NIDA), and the National Institute of Mental Health (NIMH).
Theories of Pain
In the past several decades, important
discoveries about pain-suppressing chemicals came about because scientists were
curious about how morphine and other opium-derived painkillers, or analgesics,
work. For some time neuroscientists had known that chemicals were important in
conducting nerve signals (small bursts of electric current) from cell to cell.
In order for the signal from one cell to reach the next in line, the first cell
secretes a chemical, called a "neurotransmitter," from the tip of a long fiber
that extends from the cell body. The transmitter molecules cross the gap
separating the two cells and attach to special receptor sites on the neighboring
cell surface. Some neurotransmitters excite the second cell-allowing it to
generate an electrical signal. Others inhibit the second cell—preventing
it from generating a signal.
When
investigators injected morphine into experimental animals, they found that the
morphine molecules fit snugly into receptors on certain brain and spinal cord
neurons. Why, the scientists wondered, should the human brain-the product of
millions of years of evolution-come equipped with receptors for a man-made drug?
Perhaps there were naturally occurring brain chemicals that behaved exactly like
morphine.
Numerous studies around the
world led to the discovery of not just one pain-suppressing chemical in the
brain, but a whole family of such proteins. The smaller members of the family
were named enkephalins (meaning "in the head"). In time, the larger proteins
were isolated and called endorphins, meaning the "morphine within." The term
endorphins is now often used to describe the group as a whole.
The discovery of the endorphins lent
weight to an overarching theory of pain: endorphins released from brain nerve
cells might inhibit spinal cord pain cells through pathways descending from the
brain to the spinal cord. Laboratory experiments subsequently confirmed that
painful stimulation led to the release of endorphins from nerve cells. Some of
these chemicals then turned up in cerebrospinal fluid, the liquid that
circulates in the spinal cord and brain. Laced with endorphins, the fluid could
bring a soothing balm to quiet nerve cells.
A New Look at Pain Treatments
Further evidence that endorphins
figure importantly in pain control came from studies of some of the oldest and
newest pain treatments. These studies involved the use of a drug called naloxone
that prevents endorphins and morphine from working. Injections of naloxone
resulted in a return of pain which had been relieved by morphine and certain
other treatments. But, interestingly, some pain treatments are not affected by
naloxone: their success in controlling pain apparently does not depend on
endorphins. Thus nature has provided us with more than one means of achieving
pain relief.
Acupuncture.
Probably no therapy for pain has stirred more controversy in recent years than
acupuncture, the 2,000-year-old Chinese technique of inserting fine needles
under the skin at selected points in the body. The needles are manipulated by
the practitioner to produce pain relief which some individuals report lasts for
hours, or even days. Does acupuncture really work? Opinion is divided. Many
specialists agree that patients report benefit when the needles are placed near
the site of the pain, not at the body points indicated on traditional Chinese
acupuncture charts. The case for acupuncture has been made by investigators who
argue that local needling of the skin excites endorphin systems of pain control.
Wiring the needles to stimulate nerve endings electrically (electroacupuncture)
also activates endorphin systems, they believe. Further, some experiments have
shown that there are higher levels of endorphins in cerebrospinal fluid
following acupuncture.
Those same
investigators note that naloxone injections can block pain relief produced by
acupuncture. Others have not been able to repeat those findings. Skeptics also
cite long-term studies of chronic pain patients that showed no lasting benefit
from acupuncture treatments. Current opinion is that more controlled trials are
needed to define which pain conditions might be helped by acupuncture and which
patients are most likely to benefit.
Local Electrical Stimulation
(TENS). Applying brief pulses of electricity to nerve endings under the
skin, a procedure called transcutaneous electrical nerve stimulation (TENS),
yields excellent pain relief in some chronic pain patients. The stimulation
works best when applied to the skin near where the pain is felt and where other
sensibilities like touch or pressure have not been damaged. Both the frequency
and voltage of the electrical stimulation are important in obtaining pain
relief.
Brain Stimulation.
Another electrical method for controlling pain, especially the widespread and
severe pain of advanced cancer, is through surgically implanted electrodes in
the brain. The patient determines when and how much stimulation is needed by
operating an external transmitter that beams electronic signals to a receiver
under the skin that is connected to the electrodes. Stimulation-produced
analgesia is a costly procedure that involves the risk of brain surgery.
However, patients who have used this technique report that their pain "seems to
melt away." The pain relief is also remarkably specific: the other senses remain
intact, and there is no mental confusion or cloudiness as with opiate drugs.
Placebo Effects. For years
doctors have known that a harmless sugar pill or an injection of salt water can
make many patients feel better-even after major surgery. The placebo effect, as
it is called, has been thought to be due to suggestion, distraction, the
patient's optimism that something is being done, or the desire to please the
doctor (placebo means "I will please" in Latin). Later experiments suggested
that the placebo effect may be neurochemical, and that people who respond to a
placebo for pain relief-a remarkably consistent 35% in any experiment using
placebos-are able to tap into their brains' endorphin systems. To evaluate it,
investigators designed an ingenious experiment. They asked adults scheduled for
wisdom teeth removal to volunteer in a pain experiment. Following surgery, some
patients were given morphine, some naloxone, and some a placebo. As expected,
about a third of those given the placebo reported pain relief. The investigators
then gave these people naloxone. All reported a return of pain.
How people who benefit from placebos
gain access to pain control systems in the brain is not known. Scientists cannot
even predict whether someone who responds to a placebo in one situation will
respond in another. Some investigators suspect that stress may be a factor.
Patients who are very anxious or under stress are more likely to react to a
placebo for pain than those who are more calm, cool, and collected. But dental
surgery itself may be sufficiently stressful to trigger the release of
endorphins-with or without the effects of placebo. For that reason, many
specialists believe further studies are indicated to analyze the placebo effect.
As research continues to reveal the
role of endorphins in the brain, neuroscientists have been able to draw more
detailed brain maps of the areas and pathways important in pain perception and
control and have found other members of the endorphin family. At the same time,
clinical investigators have tested chronic pain patients and found that they
often have lower-than-normal levels of endorphins in their spinal fluid. If we
could just boost their stores with man-made endorphins, perhaps the problems of
chronic pain patients could be solved. Not so easy. Some endorphins are quickly
broken down after release from nerve cells. Other endorphins are longer lasting,
but there are problems in manufacturing the compounds in quantity and getting
them into the right places in the brain or spinal cord. In a few promising
studies, clinical investigators have injected an endorphin called beta-endorphin
under the membranes surrounding the spinal cord. Patients reported excellent
pain relief lasting for many hours. Morphine compounds injected in the same area
are similarly effective in producing long-lasting pain relief.
But spinal cord injections or other
techniques designed to raise the level of endorphins circulating in the brain
require surgery and hospitalization. And even if less drastic means of getting
endorphins into the nervous system could be found, they are probably not the
ideal answer to chronic pain. Endorphins are also involved in other nervous
system activities such as controlling blood flow. Increasing the amount of
endorphins might have undesirable effects on these other body activities.
Endorphins also appear to share with morphine a potential for addiction or
tolerance.
Meanwhile, chemists are
synthesizing new analgesics and discovering painkilling virtues in drugs not
normally prescribed for pain. Much of the drug research is aimed at developing
nonnarcotic painkillers. The motivation for the research is not only to avoid
introducing potentially addictive drugs on the market, but is based on the
observation that narcotic drugs are simply not effective in treating a variety
of chronic pain conditions. Developments in nondrug treatments are also
progressing, ranging from new surgical techniques to therapies like exercise,
hypnosis, and biofeedback.
New and
Old Drugs for Pain
When you complain
of headache or low back pain and the doctor says take two aspirins every 4 hours
and stay in bed, you may think your pain is being dismissed lightly. Not at all.
Aspirin, one of the most universally used medications is an excellent
painkiller. Scientists still cannot explain all the ways aspirin works, but they
do know that it interferes with pain signals where they usually originate, at
the nerve endings outside the brain and spinal cord: peripheral nerves. Aspirin
also inhibits the production of chemicals called prostaglandins that are
manufactured in the blood to promote blood clotting and wound healing.
Unfortunately, prostaglandins, released from cells at the site of injury, are
pain-causing substances. They actually sensitize nerve endings, making
them—and you—feel more pain. Along with increasing the blood supply
to the area, these chemicals contribute to inflammation—the pain, heat,
redness, and swelling of tissue damage.
Some investigators now think that the
continued release of pain-causing substances in chronic pain conditions may lead
to long-term nervous system changes in some patients, making them hypersensitive
to pain. People suffering such hyperalgesia can cry out in pain at the gentlest
touch, or even when a soft breeze blows over the affected area. In addition to
the prostaglandins, blister fluid and certain insect and snake venoms also
contain pain-causing substances. Presumably these chemicals alert you to the
need for care-a fine reaction in an emergency, but not in chronic pain.
There are several prescription drugs
that usually can provide stronger pain relief than aspirin. These include the
opiate-related compounds codeine, propoxyphene, morphine, and meperidine. All
these drugs have some potential for abuse, and may have unpleasant and even
harmful side effects. In combination with other medications or alcohol, some can
be dangerous. Used wisely, however, they are important recruits in the chemical
fight against pain.
In the search for
effective analgesics, physicians have discovered pain-relieving benefits from
drugs not normally prescribed for pain. Certain antidepressants are used to
treat several particularly severe pain conditions, notably the riveting pain of
facial neuralgias like trigeminal neuralgia and the excruciating pain that can
follow an attack of shingles.
Interestingly, pain patients who
benefit from antidepressants report pain relief before any uplift in mood. Pain
specialists think that the antidepressant works because it increases the supply
of a naturally produced neurotransmitter, serotonin. (Doctors have long
associated decreased amounts of serotonin with severe depression.) But now
scientists have evidence that cells using serotonin are also an integral part of
a pain-controlling pathway that starts with endorphin-rich nerve cells high up
in the brain and ends with inhibition of pain-conducting nerve cells lower in
the brain or spinal cord.
Antiepileptic drugs have also
been used successfully in treating trigeminal neuralgia. The rationale for the
use of antiepileptic drugs (principally carbamazepine) is based on the theory
that a healthy nervous system depends on a proper balance of incoming and
outgoing nerve signals. Trigeminal neuralgia and other facial pains or
neuralgias are thought to result from damage to facial nerves. That means that
the normal flow of messages to and from the brain is disturbed. The nervous
system may react by becoming hypersensitive: it may create its own powerful
discharge of nerve signals, as though screaming to the outside world "Why aren't
you contacting me?" Antiepileptic drugs-used to quiet the excessive brain
discharges associated with epileptic seizures-quiet the distress signals and in
that way may relieve pain.
Nondrug
Treatments
Treatment for pain can
include counseling, relaxation training, meditation, hypnosis, biofeedback, or
behavior modification. The philosophy common to all of these approaches is the
belief that patients can do something on their own to manage their pain. That
something may mean changing attitudes, feelings, or behaviors associated with
pain.
Psychotherapy. Some
patients may benefit from individual or group counseling. Trained professionals
can help the chronic pain sufferer learn valuable coping skills. They also
provide the patient with much needed support-both psychological and
emotional-for dealing with pain.
Relaxation and Meditation
Therapies. These methods enable people to relax tense muscles, reduce
anxiety, and alter mental states. Both physical and mental tension can make pain
worse, and in conditions such as headache or back pain, tension may be at the
root of the problem. Meditation, which aims at producing a state of relaxed but
alert awareness, is sometimes combined with therapies that encourage people to
think of pain as something remote and apart from them. The methods promote a
sense of detachment so that the patient thinks of the pain as confined to a
particular body part over which he or she has control. The approach may be
particularly helpful when pain is associated with fear, as in cancer.
Hypnosis. No longer considered
magic, hypnosis is a technique in which an individual's susceptibility to
suggestion is heightened. Normal volunteers who prove to be excellent subjects
for hypnosis often report a marked reduction or obliteration of experimentally
induced pain, such as that produced by a mild electric shock. The hypnotic state
does not lower the volunteer's heart rate, respiration, or other autonomic
responses. These physical reactions show the expected increases normally
associated with painful stimulation.
The
role of hypnosis in treating chronic pain patients is uncertain. Some studies
have shown that 15% to 20% of hypnotizable patients with moderate to severe pain
can achieve total relief with hypnosis. Other studies report that hypnosis
reduces anxiety and depression. By lowering the burden of emotional suffering,
pain may become more bearable.
Biofeedback. Some individuals can
learn voluntary control over certain body activities if they are provided with
information about how the system is working-how fast their heart is beating, how
tense their head or neck muscles are, how cold their hands are. The information
is usually supplied through visual or auditory cues that code the body activity
in some obvious way—a louder sound meaning an increase in muscle tension,
for example. How people use this biofeedback to learn control is not understood,
but some practitioners of the art report that imagery helps: they may think of a
warm tropical beach, for example, when they want to raise the temperature of
their hands. Biofeedback may be a logical approach in pain conditions that
involve tense muscles, like tension headache or low back pain. But results are
mixed.
Behavior modification.
This psychological technique (sometimes called operant conditioning) is aimed at
changing habits, behaviors, and attitudes that can develop in chronic pain
patients. Some patients become dependent, anxious, and homebound—if not
bedridden. For some, too, chronic pain may be a welcome friend, relieving them
of the boredom of a dull job or the burden of family responsibilities. These
psychological rewards—sometimes combined with financial gains from
compensation payments or insurance—work against improvements in the
patient's condition, and can encourage increased drug dependency, repeated
surgery, and multiple doctor and clinic visits.
There is no question that the patient
feels pain. The hope of behavior modification is that pain relief can be
obtained from a program aimed at changing the individual's lifestyle. The
program begins with a complete assessment of the painful condition and a
thorough explanation of how the program works. It is essential to enlist the
full cooperation of both the patient and family members. The treatment is aimed
at reducing pain medication and increasing mobility and independence through a
graduated program of exercise, diet, and other activities. The patient is
rewarded for positive efforts with praise and attention. Rewards are withheld
when the patient retreats into negative attitudes or demanding and dependent
behavior.
How effective are any of
these treatment methods? Are some superior to others? Who is most likely to
benefit? Do the benefits last? The answers are not yet in hand. Patient
selection and patient cooperation are all-important. Analysis of individuals who
have improved dramatically with one or another of these approaches is helping to
pinpoint what factors are likely to lead to successful treatment.
Surgery to Relieve Pain
Surgery is often considered the court
of last resort for pain: when all else fails, cut the nerve endings. Surgery can
bring about instant, almost magical release from pain. But surgery may also
destroy other sensations as well, or, inadvertently, become the source of new
pain. Further, relief is not necessarily permanent. After 6 months or a year,
pain may return.
For all those
reasons, the decision for surgery must always involve a careful weighing of the
patient's condition and the outlook for the future. If surgery can mean the
difference between a pain-wracked existence ending in death, versus a pain-free
time in which to compose one's life and see friends and family, then surgery is
clearly a humane and compassionate choice.
There are a variety of operations to
relieve pain. The most common is cordotomy: severing the nerve fibers on one or
both sides of the spinal cord that travel the express routes to the brain.
Cordotomy affects the sense of temperature as well as pain, since the fibers
travel together in the express route.
Besides cordotomy, surgery within the
brain or spinal cord to relieve pain includes severing connections at major
junctions in pain pathways, such as at the places where pain fibers cross from
one side of the cord to the other, or destroying parts of important relay
stations in the brain like the thalamus, an egg-shaped cluster of nerve cells
near the center of the brain. In addition, surgeons sometimes can relieve pain
by destroying nerve fibers or their parent cell bodies outside the brain or
spinal cord. A case in point is the destruction of sympathetic nerves (a part of
the autonomic nervous system) to relieve the severe pain that sometimes follows
a penetrating wound from a sharp instrument or bullet.
When pain affects the upper
extremities, or is widespread, the surgeon has fewer options and surgery may not
be as effective. Still, skilled neurosurgeons have achieved excellent results
with upper spinal cord or brain surgery to treat severe intractable pain. These
procedures may employ chemicals or use heat or freezing treatments to destroy
tissue, as well as the more traditional use of the scalpel.
Some surgeons have reported success
with a brain operation called cingulotomy to relieve intractable pain in
patients with severe psychiatric problems. The nerve fibers destroyed are part
of a pathway important in emotions and motivation. The surgery appears to
eliminate the discomfort and suffering the patient feels, but does not interfere
with other mental faculties such as thinking and memory.
Prior to operating, physicians can
often test the effectiveness of surgery by using anesthetic drugs to block
nerves temporarily. In some chronic pain conditions—like the pain from a
penetrating wound—these temporary blocks can in themselves be beneficial,
promoting repair of nerve damage.
How do
these current treatments apply to the more common chronic pain conditions? What
follows is a brief survey of major pain disorders and the treatments most in use
today.
The Major Pains
Headache. Tension headache,
involving continued contractions of head and neck muscles, is one of the most
common forms of headache. The other common variety is the vascular headache,
involving changes in the pressure of blood vessels serving the head. Migraine
headaches are of the vascular type, associated with throbbing pain on one side
of the head. Genetic factors play a role in determining who will have migraines,
but many other factors are important as well. A major difficulty in treating
migraine headache is that changes occur throughout the course of the headache.
Blood vessels may first constrict and then dilate. Changing levels of
neurotransmitters have also been noted. While a number of drugs can relieve
migraine pain, their usefulness often depends on when they are taken. Some are
only effective if taken at the onset. Several drugs for the prevention of
migraine have been developed in recent years, including serotonin agonists which
mimic the action of this key brain chemical. Prompt administration of these
drugs is important.
Drugs are also the
most common treatment for tension headache, although attempts to use biofeedback
to control muscle tension have had some success. Physical methods such as heat
or cold applications often provide additional, if only temporary, relief.
Low Back
Pain.
The combination of pain-killers
and modest amounts of a muscle relaxant are usually prescribed for the
first-time low back pain patient. At the initial examination, the physician will
also note if the patient is overweight or works under conditions (such as
driving a truck or sitting at a desk for long hours) that offer little
opportunity for exercise. Some authorities believe that low back pain is
particularly prevalent in Western society because of the combination of
overweight, bad posture (made worse if there is added weight up front), and
infrequent exercise.
Although bed rest
may be necessary for severe back problems, exercise is now considered to be an
important addition to treatment and can help speed recovery for many patients
with low back pain. Exercise helps reduce stress on the lower back by increasing
flexibility and strength. To avoid injury, however, carefully follow the
exercise routine prescribed by your doctor. In some cases, a full neurological
examination may be necessary, including tests to determine if there may be a
ruptured disc or other source of pressure on the cord or nerve roots.
Sometimes x-rays will show a disc
problem that can be helped by surgery. Milder analgesics (aspirin,
acetaminophen, or stronger nonnarcotic medications) and electrical
stimulation—using TENS or implanted brain electrodes—can be very
effective for low back pain. What is not effective is long-term use of
muscle-relaxant tranquilizers. Many specialists are convinced that chronic use
of these drugs is detrimental to the back pain patient, adding to depression and
increasing pain. Massage and manipulative therapy are used by some clinicians
but, except for individual patient reports, their usefulness is still
undocumented.
Cancer Pain. The
pain of cancer can result from the pressure of a growing tumor or the
infiltration of tumor cells into other organs. Or the pain can come about as the
result of radiation or chemotherapy. These treatments can cause fluid
accumulation and swelling (edema), irritate or destroy healthy tissue causing
pain and inflammation, and possibly sensitize nerve endings. Ideally, the
treatment for cancer pain is to remove the cancerous tissue. When that is not
possible, pain can be treated by any or all of the currently available
therapies: electrical stimulation, psychological methods, surgery, and strong
painkillers.
Arthritis Pain.
Arthritis is a general descriptive term meaning a disorder of the joints. The
two most common forms are osteoarthritis that typically affects the fingers and
may spread to important weight-bearing joints in the spine or hips, and
rheumatoid arthritis, an inflammatory joint disease associated with swelling,
congestion, and thickening of the soft tissue around joints. Current treatments
for arthritis include aspirin, acetaminophen, and nonsteroidal anti-inflammatory
drugs like indomethacin and ibuprofen. Steroid drugs—important
anti-inflammatory agents modeled after the body's own chemicals produced in the
adrenal glands—were introduced and hailed as lifesavers in the 1950's. But
the long-term use of steroids has serious consequences, among them the lowering
of resistance to infection, hemorrhaging, and facial puffiness-producing the
so-called moonface. TENS and acupuncture have been tried with mixed results. In
cases where tissue has been destroyed, surgery to replace a diseased joint with
an artificial part has been very successful. The total hip replacement operation
is an example.
Arthritis is best treated
early, say the experts. A modest program of drugs combined with exercise can do
much to restore full function and forestall long-term degenerative changes.
Exercise in warm water is especially good since the water is both relaxing and
provides buoyancy that makes exercises easier to perform. Physical treatments
with warm or cold compresses are helpful sources of temporary pain relief.
Neurogenic Pain. The most
difficult pains to treat are those that result from damage to the peripheral
nerves or to the central nervous system itself. Mentioned earlier in this
brochure as examples of extraordinarily searing pain were trigeminal neuralgia
and shingles, along with several drugs that can help in these conditions. In
addition, trigeminal neuralgia sufferers can benefit from surgery to destroy the
nerve cells that supply pain-sensation fibers to the face. An advantage to using
a treatment called "thermocoagulation"—which uses heat supplied by an
electrical current to destroy nerve cells—is that pain fibers are more
sensitive to the treatment resulting in less destruction of other sensations
(such as touch and temperature).
Sometimes
specialists treating trigeminal neuralgia find that certain blood vessels in the
brain lie near the group of nerve cells supplying sensory fibers to the face,
exerting pressure that causes pain. The surgical insertion of a small sponge
between the blood vessels and the nerve cells can relieve the pressure and
eliminate pain.
Among other
notoriously painful neurogenic disorders is pain from an amputated or paralyzed
limb—so called "phantom" pain—that affects a significant number of
amputees and paraplegia patients. Various combinations of antidepressants and
weak narcotics like propoxyphene are sometimes effective. Surgery, too, is
occasionally successful. Many experts now think that the electrical stimulating
techniques hold the greatest promise for relieving these pains.
Psychogenic Pain. Some cases of
pain are not due to past disease or injury, nor is there any detectable sign of
damage inside or outside the nervous system. Such pain may benefit from any of
the psychological pain therapies listed earlier. It is also possible that some
new methods used to diagnose pain may be useful. One method gaining in
popularity is thermography, which measures the temperature of surface tissue as
a reflection of blood flow. A color-coded "thermogram" of a person with a
headache or other painful condition often shows an altered blood supply to the
painful area, appearing as a darker or lighter shade than the surrounding areas
or the corresponding part on the other side of the body. Thus an abnormal
thermogram in a patient who complains of pain in the absence of any other
evidence may provide a valuable clue that can lead to a diagnosis and treatment.
Where to Go for Help
People with chronic pain have usually
seen a family doctor and several other specialists as well. Eventually they are
referred to neurologists, orthopedists, or neurosurgeons. The patient/doctor
relationship is extremely important in dealing with chronic pain. Both patients
and family members should seek out knowledgeable specialists who neither dismiss
nor indulge the patient, physicians who understand full well how pain has come
to dominate the patient's life and the lives of everyone else in the family.
Contrary to what many people think, pain
patients are not malingerers or hypochondriacs. They are men and women of all
ages, education, and social background, suffering a wide variety of painful
conditions.
People with pain problems may
feel isolated, helpless, or hopeless. But many of those who suffer with a pain
problem can be helped if they-and their families-understand all the causes of
pain, and the many and varied steps that can now be taken to undo what chronic
pain has done. As a result of the strides neuroscience has made in tracking down
pain in the brain—and in the mind—we can expect more and better
treatments in the years to come. The days when patients were told "I'm sorry,
but you'll have to learn to live with the pain" will be gone forever.