What Is a Headache?
A headache is diffuse pain in the head not confined to the area of distribution of any nerve (1). By headache we usually mean pain anywhere between the back of the head and front (like tension headache), or pain in one half of the head (like migraine or cluster headache).
Head pain confined to particular parts of the head usually have more specific names, like earache, toothache, sinus headache, TMJ pain.
Headache Types and Causes
1. PRIMARY Headaches
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