What is a migraine headache?

This often severe, throbbing type of headache is different from other types of headaches in that symptoms other than pain occur with the headache. Nausea and vomiting, lightheadedness, sensitivity to light (photophobia), and other visual disturbances are common migraine symptoms. A migraine headache may last from 4 to 72 hours.

Migraines are also unique in that they have distinct phases. Not all people have each phase, however. The phases of a migraine headache may include:

  • Premonition phase. A change in mood or behavior that may occur hours or days before the headache.
  • Aura phase. About 1 out of 4 or 5 people who have migraine headaches describe having an unusual “feeling” or aura before the headache.The aura phase consists of a group of visual, sensory, or motor symptoms that immediately precede the headache. Examples include hallucinations, numbness, changes in speech, visual changes, and muscle weakness. Migraine sufferers may or may not have an aura prior to the beginning of the headache.
  • Headache phase. This is the period during the actual headache. Throbbing pain occurs on one or both sides of the head. Sensitivity to light and motion is common, as are depression, fatigue, and anxiety.
  • Headache resolution phase. Pain lessens during this phase, but may be replaced with fatigue, irritability, and difficulty concentrating. Some people feel refreshed after an attack, while others do not.

Headaches are classified as with or without aura.

What causes migraine headaches?

No one is quite sure exactly what causes a migraine headache. Many experts think changes in serotonin levels in the brain may be the cause.

What are the symptoms of migraine headaches?

In order to get an accurate diagnosis, it is important to describe your migraine symptoms to your doctor. Also, it is helpful to track when migraines occur (such as dates and times) and the details associated with migraine headaches. The following are the most common symptoms of migraine headache. However, each person may experience symptoms differently. Symptoms may include:

  • Throbbing, severe headache pain with a specific location either on one side or another
  • Nausea and vomiting, lightheadedness, sensitivity to light may also occur during a migraine
  • Visual disturbances, even lack of sight, may occur for a short period of time with a migraine headache
  • A change in mood or behavior that may occur hours or days before the headache
  • Depression, fatigue or anxiety may occur
  • As the headache resolves, you may notice fatigue, irritability, and difficulty concentrating
  • Some headaches have an aura prior to a migraine, which may experienced as a flashing light or other visual changes

The symptoms of migraine headache may resemble other conditions or medical problems. Always consult your health care provider for a diagnosis.

How are migraine headaches diagnosed?

Migraine headaches are diagnosed based on your symptoms and a physical exam. You may need other tests or procedures to rule out underlying diseases or conditions.

Tracking and sharing information about your headache with your doctor helps with the process of making an accurate diagnosis. Consider writing down the following information to take to your medical appointment:

  • Time of day when your headaches occur
  • Specific location of your headaches
  • How your headaches feel
  • How long your headaches last
  • Any changes in behavior or personality
  • Effect of changes in position or activities on the headache
  • Effect of headaches on sleep patterns
  • Information about stress in your life
  • Information about any head trauma, either recently or in the past

Diagnostic tests that may be used to confirm a migraine diagnosis include the following:

  • Blood tests. Various blood chemistry and other lab tests may be used to check for underlying conditions.
  • Sinus X-rays. An X-ray to evaluate for congestions or other problems related to the headaches.
  • MRI: A diagnostic procedure, usually of the head or neck, that uses a combination of large magnets, radiofrequencies, and a computer to produce detailed images of organs and structures
  • CT scan or computed tomography scan. A diagnostic imaging procedure that uses a combination of X-rays and computer technology to producer horizontal, or axial, images (often called slices) of the body or head. CT scans show more detail than standard X-rays.
  • Spinal tap (also called a lumbar puncture). A special needle is placed into the lower back, into the spinal canal, which is the area around the spinal cord. The pressure in the spinal canal and brain can then be measured. A small amount of cerebral spinal fluid (CSF) can be removed and sent for testing to determine if there is an infection or other problems. CSF is the fluid that contains the brain and spinal cord.


Specific treatment for migraine headaches will be determined by your health care provider based on:

  • Your age, overall health, and medical history
  • Type of migraine
  • Severity and frequency of the migraine
  • Your tolerance for specific medications, procedures, or therapies
  • Your opinion or preference

What are the complications of migraine headaches?

Complications of migraine headaches may include:

  • Severe headache pain, often in one part of your head, such as near one eye
  • Potential nausea and vomiting
  • Immobility and lack of activity due to severe pain
  • Loss of work time and personal time

Can migraine headaches be prevented?

The ultimate goal of treatment is to prevent migraines from occurring. Adequate management depends on the accurate identification of the type of headache and may include:

  • Avoiding known triggers, such as certain foods and beverages, caffeine, lack of sleep, and fasting
  • Changing eating habits
  • Exercise
  • Resting in a quiet, dark environment
  • Medications, as recommended by your doctor
  • Stress management
  • Therapeutic massage
  • Treating yourself with prescribed medication when you have an aura

Migraine headaches may require specific medication management including:

  • Abortive medications. Medications, prescribed by your doctor, that act on specific receptors in both the brain and the blood vessels in the head, stopping a headache once it is in progress.
  • Rescue medications. Medications purchased over the counter, such as pain relievers, to diminish or stop the headache.
  • Preventive medications. Medications prescribed by your doctor that are taken daily to suppress the onset of severe migraine headaches.

When should I call my health care provider?

Some headaches may require immediate medical attention, including hospitalization for observation, and diagnostic testing. Treatment is individualized, depending on the underlying condition causing the headache. Full recovery depends on the type of headache and other medical problems that may be present.

Key points

  • A migraine is a severe, throbbing type of headache.
  • Nausea and vomiting, lightheadedness, sensitivity to light (photophobia), and other visual disturbances are common migraine symptoms.
  • A migraine headache may last from 4 to 72 hours.
  • Preventing a migraine headache is often the most effective approach for treatment.
  • Migraine headaches can have a predictable pattern that can help you recognize and treat them appropriately.
  • Many people have an aura prior to a migraine and intervention may help at that time.
  • Managing stress and getting regular exercise may help prevent or lessen the occurrence of migraine headaches.

Next steps

Tips to help you get the most from a visit to your health care provider:

  • Before your visit, write down questions you want answered.
  • Bring someone with you to help you ask questions and remember what your provider tells you.
  • At the visit, write down the names of new medicines, treatments, or tests, and any new instructions your provider gives you.
  • If you have a follow-up appointment, write down the date, time, and purpose for that visit.
  • Know how you can contact your provider if you have questions.
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Treatments for Migraines

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Symptoms and Screenings for Migraines

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Causes and Preventions for Migraines

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Education and Resources for Migraines

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