Migraine
Family history: A person has more of a chance of getting migraines if one of their parents has had them. The International Headache Consortium are doctors from a lot of different countries who study headaches and what causes them. They have found four genetic variations - these are differences in a persons genes - that are risk factors for migraine without aura in people who have these differences. Two of these genetic variations had already been shown to play a role in migraine with aura.