The risk period of intracranial hemorrhage, at least about 2 weeks, is mainly based on the bleeding volume of cerebral hemorrhage, because the bleeding volume below 30 ml is small, 30-50 ml is medium, and more than 50 ml is large. Then the amount of bleeding affects the patient’s prognosis, and its risk period is different. If a small amount of bleeding is about 2 weeks, if a medium amount of bleeding is not done through minimally invasive skull surgery, the patient’s cerebral edema period may be delayed to 3 weeks or even 4 weeks, and a large amount of cerebral bleeding will take longer, usually about 1 month. So for a patient with brain hemorrhage, his blood pressure should be well controlled, otherwise the bleeding will continue afterwards.