There are two types of migraines that are acknowledged: migraine without aura and migraine with aura. Eighty percent of those who suffer from migraines experience migraine without aura. http://www.migrainesandheadaches.org
A kind of intense sick or nervous headache, usually periodical and confined to one side of the head; called also migraine headache. Same as megrim.
A disabling headache which is frequently limited to one side of the head and is often linked with nausea or vomiting. In a few people the attacks are preceded by aura symptoms.
A localized headache often associated with visual sensations, nausea and malaise. It is not common after head injury, but is a recognised rare sequel of minor head injury.