Hypertension is a very common chronic disease, is the patient’s blood pressure exceeds 140/90mmHg for three days. patients with hypertension will have headaches, dizziness, head swelling, swelling and pain in the front and back of the head, eye pain and even fainting. If the blood pressure is poorly controlled and continues to rise and fluctuate more throughout the year, it can lead to sudden coma. Cerebral hemorrhage, often called a stroke, is a rupture of a blood vessel in the brain that causes bleeding in the brain tissue, resulting in coma. A cerebral embolism is a blockage of a blood vessel in the brain that forms an embolus, which can also lead to coma, and are two of the more common causes of coma with high blood pressure. In case of cerebral embolism and cerebral hemorrhage, it is necessary to call 120 to rush the patient to the hospital and do emergency CT and MRI to clarify the diagnosis and the cause of coma, so as to reduce the patient’s complications and minimize the risk of life.