Right headache is divided into two kinds of headache, primary headache and secondary headache, and the common causes are as follows: 1. Primary headache: there are commonly vascular neurological headache, migraine, tension headache, and if the pain is more severe and accompanied by pain around the eyes, photophobia, tearing and other symptoms, it may also be cluster headache. 2. Secondary headache: that is, headache caused by some diseases, such as brain tumor, massive cerebral infarction, cerebral hemorrhage, etc. Brain diseases cause pressure on the brain, which in turn causes a significant increase in intracranial pressure, and such patients are often accompanied by nausea and vomiting. In addition, there is also traumatic headache. Some patients may suffer from chronic trauma, such as hitting their head against a door frame, and when they do not pay attention to it, they may develop chronic subdural hematoma, which in turn causes headache.