The exact cause of migraines is unknown, but they're thought to be the result of abnormal brain activity temporarily affecting nerve signals, chemicals and blood vessels in the brain.
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It's not entirely clear what causes migraines. They're known to be triggered by periods, stress, tiredness and certain foods or drinks.
You can ease symptoms of a migraine with painkillers and medicines to stop you feeling sick. Lying down in a dark room may also help.
You may be able to reduce your migraines by avoiding things that tend to cause them. Eating and sleeping well and regular exercise can also help.
A migraine can feel like a throbbing headache, usually on 1 side of the head. Other symptoms include feeling sick and sensitivity to light.
Page last reviewed: 10/05/2019
Next review due: 10/05/2022