With more than eight million people in the UK affected, migraine is more common than diabetes, epilepsy and asthma combined. Yet it's often badly misunderstood and awareness is low.
As the Migraine Trust, a charity which supports people affected by migraine and funds research, points out, the World Health Organisation (WHO) recognises migraine as one of the most debilitating lifetime conditions. But a lot of people still think it's just a fancy word for a headache.
The trust hopes Migraine Awareness Week, which this year runs from September 1 to 7, will dispel some of the myths surrounding the condition.
Anybody can suffer from migraines, though they're more common among women, and while children can be affected, attacks usually start during teens.
Currently there's no cure, but treatments are available which can help and, most crucially, understanding migraine can make a huge difference in managing it.
Here's some expert tips to help you live with migraines.