The risks of craniotomy for cerebral hemorrhage are as follows: 1. anesthesia risk, especially in elderly patients, there are risks of anesthesia allergy, unstable vital signs such as blood pressure drop and heart rhythm disturbance during anesthesia, etc.; 2. the surgical area may bleed again after surgery, and if the bleeding is large, secondary surgery is needed, and the trauma and risk of secondary surgery is larger than the first; 3. intracranial infection, all craniotomies have the possibility of Most of the cerebral hemorrhage occurs in elderly patients, who are weaker and have poorer resistance, plus the cerebral hemorrhage is an emergency surgery, and the preoperative preparation is rushed, so it is easy to complicate the intracranial infection after surgery; 4. Some cerebral hemorrhage is caused by the rupture of aneurysm, and when removing the hematoma and dealing with the aneurysm during surgery, there is a risk of life-threatening hemorrhage when the aneurysm suddenly ruptures again.