Some cerebral hemorrhage can take some drainage surgery, which is relatively less traumatic and more beneficial, and has a very good effect on some small amount of cerebral hemorrhage. At the same time, there are also some risks, the biggest of which is intracranial hemorrhage again.1. Because after brain hemorrhage, the blood vessel wall becomes thin and the surrounding tissues are stretched, the general defense ability is relatively weak at this time, when doing drainage surgery, the brain tissue will inevitably be damaged again. If you are not careful, brain hemorrhage will occur again, which is the biggest risk. 2, intracranial infection, because the original intracranial is a closed organ, it is sterile, when the cranium is opened, some drainage line, this time is very likely to bring the bacteria outside the cranium into the cranium, resulting in intracranial infection. This kind of intracranial infection must be actively prevented, otherwise it may sometimes lead to disability and death due to intracranial infection.3. In addition, there are other related risks, such as the fracture of the drainage tube and the distortion of the drainage tube, which may cause some brain tissue damage, thus causing damage to the area governing the related functional activities.