A migraine is a type of headache. It may occur with symptoms such as nausea, vomiting, or sensitivity to light and sound. In many people, a throbbing pain is felt only on one side of the head.
A migraine headache is caused by abnormal brain activity. This activity can be triggered by many things. But the exact chain of events remains unclear. Most medical experts believe the attack begins in the brain and involves nerve pathways and chemicals. The changes affect blood flow in the brain and surrounding tissues.
Migraine headaches tend to first appear between the ages of 10 and 45. Sometimes, they begin later in life. Migraines may run in families. Migraines occur more often in women than men. Some women, but not all, have fewer migraines when they are pregnant.
Migraine attacks may be triggered by any of the following:
Migraines can also be triggered by certain foods. Most common are:
True migraine headaches are not a result of a brain tumor or other serious medical problem. Only a health care provider who specializes in headaches can determine if your symptoms are due to a migraine or other condition.
There are two common types of migraines:
An aura is a group of nervous system (neurologic) symptoms. These symptoms are considered a warning sign that a migraine is coming. Most often the vision is affected and can include any or all of the following:
Other nervous system symptoms include yawning, difficulty concentrating, nausea, trouble finding the right words, dizziness, weakness, numbness and tingling.
An aura often occurs 10 to 15 minutes before the headache, but can occur just a few minutes to 24 hours beforehand. A headache does not always follow an aura.
The headaches usually:
Other symptoms that may occur with the headache include:
Symptoms may linger, even after the migraine goes away. This is called a migraine hangover. Symptoms can include:
Your doctor can diagnose migraine headache by asking about your symptoms and family history of migraines. A complete physical exam will be done to determine if your headaches are due to muscle tension, sinus problems, or a brain disorder.
There is no specific test to prove that your headache is actually a migraine. Your doctor may order a brain CT or MRI scan if you have never had one before. The test may also be ordered if you have unusual symptoms with your migraine, including weakness, memory problems, or loss of alertness.
An EEG may be needed to rule out seizures. A lumbar puncture (spinal tap) might be done.
There is no specific cure for migraine headaches. The goal is to treat your migraine symptoms right away, and to prevent symptoms by avoiding or changing your triggers.
A key step is learning how to manage your migraines at home. A headache diary can help you identify your headache triggers. Then you and your doctor can plan how to avoid these triggers.
If you have frequent migraines, your doctor may prescribe medicine to reduce the number of attacks. You need to take the medicine every day for it to be effective. Medicines may include:
Botulinum toxin type A (Botox) injections may also help reduce migraine attacks if they occur more than 15 days a month.
Some people find relief with minerals and vitamins. Check with your doctor to see if riboflavin or magnesium are right for you.
TREATING AN ATTACK
Other medicines are taken at the first sign of a migraine attack. Over-the-counter (OTC) pain medicines, such as acetaminophen, ibuprofen, or aspirin are often helpful when your migraine is mild. Be aware that:
If these treatments do not help, ask your doctor about prescription medicines. These include nasal sprays, suppositories, or injections.
Some migraine medicines narrow the blood vessels. If you are at risk for having a heart attack or have heart disease, talk with your doctor before using these medicines. Some migraine medicines should not be used by pregnant women. Talk with your doctor about which medicine is right for you if you are pregnant or planning to become pregnant.
Other medicines treat symptoms of migraine, such as nausea and vomiting. They may be used alone or along with the other drugs that treat the migraine itself.
Feverfew is a herb for migraines. It can be effective for some people. Before using feverfew, make sure your doctor approves. Herbal remedies sold in drugstores and health food stores are not regulated. Work with a trained herbalist when selecting herbs.
American Headache Society -- www.achenet.org
The National Migraine Association -- www.migraines.org
National Headache Foundation -- www.headaches.org
Each person responds differently to treatment. Some people have migraines only rarely and need little to no treatment. Others need to take several medicines or even go to the hospital sometimes.
Migraine headache is a risk factor for stroke. Risk is higher in people who have migraines that occur with aura. People with migraines should avoid other risk factors for stroke. These include:
Call 911 if:
Schedule an appointment or call your doctor if:
Reviewed By: Joseph V. Campellone, M.D., Division of Neurology, Cooper University Hospital, Camden, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.