The chance of delayed cerebral hemorrhage is still very high in clinical practice, around 10-15%. But it is higher or lower, depending on other factors. If the patient has a cerebral hemorrhage and has severe hypertension that is not closely monitored and controlled, the chance of delayed cerebral hemorrhage is very high, sometimes more than 20%. However, if the blood pressure is relatively well controlled and stable, the chance of brain hemorrhage may be only about 5%. In the clinic, we must be alert to the change of blood pressure after cerebral hemorrhage, if there is a special elevation, we need to give timely antihypertensive treatment, keep the systolic blood pressure between 120-130mmHg, which is relatively stable, otherwise in the later stage, many of the chances of cerebral hemorrhage will be increased. So early clarification of the condition, early measures to reduce the chances associated with late cerebral hemorrhage.