Occasional headaches and brain fever are common and everyone has experienced them at one time or another, but there are several types of headaches that are less common and may be signs of brain hemorrhage: 1. If the headache is very severe and is accompanied by hemiparesis or impaired consciousness, it may be a typical sign of hypertensive brain hemorrhage, and patients with a history of hypertension should be alert and seek medical attention in a timely manner. 2.If the headache comes rapidly, occurs within seconds or minutes, and is extremely severe distension or burst-like pain, accompanied by vomiting and cervical tonicity (spasmodic contraction and pain in the neck muscles, neck stiffness and restricted movement), it may be a subarachnoid hemorrhage, so call 120 emergency immediately. Warm tip: If you have the above headache symptoms, patients must go to the hospital or call 120 emergency immediately. If a headache patient becomes impaired in consciousness, the patient should lie flat with head turned to the side to avoid asphyxiation caused by vomit, and call 120 emergency number in time to wait for the arrival of ambulance. In case of respiratory and cardiac arrest, simple first aid can be given through artificial respiration and chest compressions.