Is it a headache or a migraine?

Migraines are typically recurrent attacks of a dull and throbbing headache, which often, although not always, affects only one side of the head. — dpa

You only need to suffer from a few bad headaches before you start to wonder: Are these perhaps migraines, and not just lack of caffeine or stress headaches?

Around 40% of the population are believed to suffer from some kind of headache disorder, and while the exact cause of migraines is unknown, much is known about the symptoms and how individual episodes can be triggered.