Speaking of always having a headache. What happened?

There are many causes of headache, most of which are not serious, and a few may be fatal. Headaches in different parts may have different diseases. For example, the whole head hurts, which may be brain tumor, intracranial hemorrhage, intracranial infection, tension headache, low intracranial pressure headache and so on. If it is unilateral headache, it may be vascular migraine, sinusitis headache, otogenic headache, odontogenic headache, etc. And if it's a headache,