Migraine is a type of really bad headache often felt on one side of the head. Some children get migraines every now and then, while others get them more than once a week. The headaches can range from being mild to very severe. Migraine headaches happen to about six in every 100 people. They are common in children and in many cases they appear to run in the family. Migraine is not a serious or life-threatening disorder. It is painful and annoying at the time, but it is not usually a serious problem. About half of children who get migraines will continue to have them when they are adults. In teenagers and adults migraines are more frequent in females, but in children they happen equally between boys and girls.