Headache is a common clinical symptom. It is usually confined to the upper part of the head, including the brow arch, upper edge of the helix, and extraoccipital protuberance. The pain is collectively referred to as headache.
There are many causes of headaches, such as neuralgia, intracranial infection, intracranial space-occupying lesions, cerebrovascular disease, extracranial head and facial diseases, and systemic diseases such as acute infection and poisoning. The age of onset is common in young, middle-aged and old people.
But about 5% of people in the world have never had a headache. It feels good not to have a headache!