The headache may be a primary headache, cerebral hemorrhage, subarachnoid hemorrhage, etc., and the cause of the headache should be identified in a timely manner. 1. Primary headache: Migraine and cluster headache can cause severe headache during acute attack, which can be explosive pain. 2. Cerebral hemorrhage: Increased intracranial pressure caused by cerebral hemorrhage can also cause a splitting headache, which may be accompanied by vomiting, dizziness and other symptoms. 3. Subarachnoid hemorrhage: the sudden onset of this disease, the patient’s headache is more serious, and accompanied by vision loss, conjunctival hemorrhage, nausea, vomiting symptoms, the serious condition of the patient will be impaired consciousness, coma, or even death. Therefore, if the patient suddenly has a splitting headache, it is recommended to go to the hospital in time to improve the imaging examination, and carry out the corresponding treatment, so as not to delay the condition.