The appearance of headache accompanied by nausea, caused by the following main causes: 1. cerebral hemorrhage, mostly in middle-aged and elderly people, most of them have a history of hypertension, the appearance of severe headache, nausea, jet-like vomiting, etc., considered to be caused by cerebral hemorrhage, the appearance of headache considered to be caused by increased intracranial pressure, you can go to the hospital to check the head CT for confirmation. 2. fever such as pneumonia, acute upper respiratory tract infection, etc., can be accompanied by chills, The main treatment is symptomatic treatment, usually drink more water, do not stay up late, eat a light diet, determine the cause of the disease and then treat it symptomatically.