How does cranial nerve ache return a responsibility

Any pain in the head must first be excluded from secondary headaches, which may be systemic diseases or local diseases of the brain, such as fever, high blood pressure, which is systemic diseases. In addition, organic diseases of the head can also cause headaches. Encephalitis, meningitis, subarachnoid hemorrhage, cerebral hemorrhage, cerebrovascular disease, head trauma, subdural hematoma, cancer, and inflammatory demyelinating diseases may also cause headaches, including venous sinus thrombosis, which must be ruled out one by one, as well as intracranial tumors. In addition, if the above systemic diseases are ruled out, it is considered to be primary or idiopathic headache, which may be migraine, cluster headache or tension headache.