The causes of headache: first, vascular factors, which are the most common, such as vascular sclerosis, aneurysm, arteriovenous malformation, arteriovenous fistula and other factors, hypertension can also cause vascular headache; second, the symptoms of brain tissue lesions, such as tumors and inflammation inside the head can also cause headache; third, we have fluid inside the normal head, called cerebrospinal fluid, which has a circulation pathway. If the cerebrospinal fluid pathway is blocked, hydrocephalus will form, and hydrocephalus can also cause headache; fourth, there are some other rare causes, such as drug and food causes; fifth, hereditary causes, such as migraine. Therefore, patients with headache should go to the hospital as soon as possible to be diagnosed and evaluated by a regular specialist before determining the next treatment plan or precautions.