The cerebellum is not usually removed, but in special cases, such as cerebellar tumors and cerebellar hemorrhage, some people need to have part of the cerebellum removed. Some people do not have any clinical symptoms after cerebellar resection, mainly because other aspects of the brain are more completely compensated, and most of the resected areas are non-functional, so sometimes the symptoms are very mild, and many of them do not have special clinical manifestations. However, the extent of resection varies according to the form of the lesion. If the scope of resection is too large, it may cause the patient’s ataxia, that is, the hands and feet are not in the same channel, and want to move the hands, but sometimes will move the feet, and then walk unsteadily and produce vertigo. This is mainly due to the removal of the cerebellum, which is in charge of the body’s balance. Therefore, the cerebellum is like a drunken person who sways from side to side, and some people also have adverse reactions such as nausea and vomiting. Therefore, the cerebellum should not be removed as much as possible, and if it must be removed, it should be treated according to the specific situation at that time.