Not all headaches are migraines, and all migraines are not severe. The simple definition of a migraine is a “one-sided” headache – a headache that affects only one side of the head or the top of the head.
Headaches that affect both temples or both the front and back of the head are more likely due to tension, sinus infection, TMJ disorder or other cause.
This is where it gets a little controversial: To many people, the term migraine usually means a very severe and painful headache. In reality, though, migraine actually refers to the location and possibly the type of headache, and has nothing to do with severity. Some people who have migraines experience absolutely no pain, just visual symptoms. In contrast, other people with severe tension headaches require hospitalization.