What causes brain pain?

Headache is a common clinical symptom. It normally refers to pain confined to the upper part of the head, including the eyebrow arch, the upper edge of the helix and the external occipital eminence. There are many causes of headache, which can be roughly divided into primary headache and secondary headache. Primary headache cannot be attributed to a specific cause, but can also be called idiopathic headache. Common headaches such as migraine and tension headache; The cause of secondary headache can involve various intracranial diseases, such as cerebrovascular disease, intracranial infection, craniocerebral trauma, systemic diseases, such as fever, internal environment disorder and abuse of psychoactive drugs, etc.