Blood pressure suddenly rises to 200mmHg is divided into sphygmomanometer instrumental causes and pathological causes, pathological causes are cardiovascular diseases, endocrine diseases and mental diseases. 1. Instrumental causes: If the blood pressure is at normal level or only mild hypertension, without any recent discomfort or other diseases, then the sudden rise of blood pressure to 200mmHg may be caused by damage to the sphygmomanometer. 2. Pathological causes: cardiovascular disease is a common cause of this symptom, such as malignant hypertension and acute cerebral hemorrhage and other diseases; endocrine diseases can also lead to this phenomenon, such as pheochromocytoma, etc., hypertensive patients with secondary hyperthyroidism and other symptoms can be triggered; hypertensive patients with anxiety and other psychiatric illnesses, then the attack of the blood pressure can also rise to 200mmHg. If you suspect that this symptom is pathological, you need to go to the hospital in time to find out the cause of the disease and have a professional diagnosis and treatment.