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What is a migraine?

Approximately 26 million Americans — 70 percent of them women — suffer from migraine, a type of headache that's often severe. Although any head pain can be miserable, migraines are in a class by themselves. These painful headaches may be preceded by a warning sign (aura) such as flashes of light, dizziness, or numbness and are often accompanied by severe nausea and vomiting and extreme sensitivity to light and sound. Migraine pain can be excruciating and may incapacitate you for hours or even days.

Fortunately, though, migraine pain management has improved dramatically in the last decade. If you've seen a doctor in the past and had no success, it's time to make another appointment. Although there's still no cure, there are medications that can help reduce the frequency of migraines and stop the pain once it's started. The right medicines combined with self-help remedies and changes in lifestyle may make a tremendous difference for you.

Brain & Nervous System Center

Signs and symptoms

A migraine usually begins with an intense, gripping pain on one side of your head that may gradually spread. Migraines typically last from 4 hours to 72 hours, but the frequency with which they occur can vary from person to person. You may have headaches several times a month or just once or twice a year.

Not all migraines have the same patterns. Although there are several kinds of migraines, the most common are classic migraine — which is a migraine with aura — and common migraine, which has no aura.

If you're among the 10 percent of adults who have migraines with aura, you'll likely have warning signs about 20 minutes before the headache begins. These may include: Although a migraine without aura has no classic warning signs, you may have one or more symptoms of premonition several hours before your headache actually strikes, including:
Depression

Migraine symptoms in children

Migraines typically begin in childhood, adolescence or early adulthood and often become less frequent and intense as you grow older. Although it's normal to think of adults as having migraines, children as young as age 2 can also have these headaches. In fact, it's estimated that between 2.5 percent and 22 percent of children experience intense headache pain. In addition to physical suffering, severe headaches often mean missed school days and trips to the emergency room, as well as lost work time for anxious parents.

Children's migraines are often accompanied by nausea, vomiting, increased sensitivity to light, diarrhea, increased urination, sweating and thirst. Visual auras aren't as common in children as in adults. If your child does have auras, he or she may also have premonition symptoms, such as: Older children may have all of the signs and symptoms of migraine — nausea, vomiting, increased sensitivity to light and sound — but no head pain. These "abdominal migraines" can be especially difficult to diagnose.

The good news is that the same medications that are effective for adults also work for children. Your child doesn't have to suffer the pain and disruption of migraines. If your child has headaches, be sure to talk to your pediatrician. He or she may want to refer your child to a pediatric neurologist.

Diarrhea
Children's Health Center

Causes

Although much about headaches still isn't understood, some researchers think migraines may be caused by functional changes in the trigeminal nerve system, a major pain pathway in your brain, and by imbalances in the brain chemical serotonin, which regulates pain messages going through this pathway.

During a headache, serotonin levels drop. Researchers believe this causes the trigeminal nerve to release substances called neuropeptides, which travel to your brain's outer covering. There they cause blood vessels to become dilated and inflamed. The result is severe headache pain.

Other studies using brain scans have shown that the volume and amount of blood reaching the brain drops during migraine attacks. This has led some experts to speculate that migraines occur when blood drains from the blood vessels in the center of your brain to outer blood vessels. Because levels of magnesium, a mineral involved in nerve cell function, also drop right before or during migraines, it's possible that low amounts of magnesium may cause nerves in the brain to misfire.

Whatever the exact mechanism of headaches, they don't just occur on their own — Something has to trigger them. Triggers can be almost anything, ranging from allergies and stress to sun glare and changes in barometric pressure.

For the nearly 65 percent of women who have migraines immediately before, during or right after their periods, that something may be changes in estrogen levels. Although the exact relationship between hormones and headaches isn't clear, hormonal fluctuations, especially during menstruation and pregnancy, seem to trigger headaches in many women with migraines.

Certain foods appear to trigger headaches in some people. Common offenders include alcohol, especially beer and red wine; aged cheeses; chocolate; fermented, pickled or marinated foods; monosodium glutamate (a key ingredient in some Asian foods, certain seasonings, and many canned and processed foods); aspartame and caffeine.

Other common migraine triggers include:
Risk factors

If both your parents have migraines, there's a 75 percent chance you will too. If just one parent has migraines, you have a 50 percent chance of being affected. You also have a relatively higher risk of migraines if you're young and female. In fact, women are three times more likely to have migraines than men are. Headaches tend to affect boys and girls equally during childhood but increase in girls after puberty.

If you're a woman with migraines, you may find that your headaches are worse during menstruation or the first few months of pregnancy. And you may not be able to tolerate birth control pills or hormone replacement therapy (HRT).

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When to seek medical advice

Try over-the-counter (OTC) medications such as acetaminophen (Tylenol, generics), ibuprofen (Advil, Motrin), aspirin (for adult use only — Don't give aspirin to children under 16 because of the risk of Reye's Syndrome, a rare but potentially fatal disease) or other self-care measures for a day or two. If you don't get relief, see your doctor. Even if you have a history of headaches, see your physician if the pattern changes or your headaches suddenly feel different.

Be sure to see your doctor immediately or go to the emergency room if you have any of the following signs and symptoms, which may indicate another, more serious medical problem:
Reye's syndrome
Concussion

Screening and diagnosis

If you have typical migraine headaches or a family history of migraines, your doctor will likely be able to diagnose the condition on the basis of your medical history and a physical exam. But if your headaches are unusual, very severe or have come on suddenly, your doctor may recommend certain tests to rule out other possible causes for your pain.

You may have X-rays of your skull and sinuses, vision tests or magnetic resonance imaging (MRI) — a diagnostic imaging procedure that combines a strong magnetic field, radio waves and computer technology to produce clear images of your internal organs, including your brain. During an MRI, you'll lie on a special table while detector measurements are taken of your body from thousands of angles. This information is then processed by a computer to produce a three-dimensional representation of your head.

If your doctor suspects that your headaches are caused by an underlying medical condition, he or she may recommend that you have a spinal tap (lumbar puncture). In this procedure, a thin, hollow needle is inserted between two vertebrae in your lower back. Once the needle is in place, the pressure of the cerebrospinal fluid (CSF) is measured, and a sample of the fluid is withdrawn for testing.

The procedure takes about 30 minutes. You may have a feeling of pressure while the fluid is being extracted and a headache afterward because of a drop in CSF pressure. Lumbar puncture isn't without other risks, including a small risk of infection.

Spinal tap (lumbar puncture)

Complications

It's likely your headaches don't signal a serious medical condition. But in a small number of cases, headaches may be a symptom of a blood clot or brain tumor. Temporal arteritis, which usually affects those over age 55, is a rare, headache-related condition that may lead to blindness or stroke if not treated.

Sometimes even your efforts to control your pain can cause problems. If you take over-the-counter or prescription headache medications more than three times a week, you may be setting yourself up for a serious complication known as rebound headaches. Although these drugs can give you temporary relief, your body gets used to them over time. The result is that your headaches become worse or more frequent. You then use more pain medication, which traps you in a vicious cycle. If you're caught in the rebound headache trap, talk to your doctor. In addition, nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen (Advil, Motrin) and aspirin may cause side effects such as stomach pain, bleeding and ulcers, especially if taken in large doses or for a long period of time.

Brain tumor
Rebound headache

Treatment

At one time, aspirin was almost the only available treatment for headaches. Now there are drugs specifically designed to treat migraines. Several drugs commonly used to treat other conditions also may help relieve migraines in some people. These medications fall into two classes — those that reduce or prevent migraines, and those that stop pain once it's started.

Abortive drugs stop or decrease pain after a migraine starts. You may have better results from these medications if you rest or sleep in a dark room after taking them. They include:
Stroke
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Prevention

Prophylactic drugs help reduce the frequency and severity of migraines and may increase the effectiveness of abortive medicines during migraine attacks. In general, you use these medications only after you've tried other measures — including self-care — or if your headaches are disabling or occur more than two or three times a month. In most cases prophylactic drugs don't eliminate headaches completely, and some can have serious side effects. To be effective, they need to be taken every day, as your doctor recommends. Among these medications are the following:
High blood pressure
Coronary artery disease

Self-care

Several self-care measures can help reduce the number and severity of migraines. In some cases you may be able to prevent headaches entirely. One or more of the following suggestions may be helpful for you:
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Coping skills

Living with migraines is a daily challenge. Headaches can be both incapacitating and unpredictable and may interfere with your job, your relationships with family and friends, and your overall quality of life. Although new treatments offer more options than ever for pain management, you may still get disabling headaches. You may also occasionally feel anxious or depressed. The following options may help you cope more easily:
How you feel pain

Complementary and alternative medicine

The following nontraditional therapies may be helpful if you suffer from chronic headache pain: — September 25, 2001 —

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Acupuncture