The aftereffects of brain bypass surgery must be treated specifically according to the situation at that time. There are times when there is no particular discomfort after the surgery and there are no aftereffects. In some cases, there may be after-effects due to changes in the condition, so it is important to clarify the specific situation at the time. Generally, if the procedure goes well, the most common after-effect is headache. However, the duration of this headache is relatively short, about 3-4 weeks can be relieved on their own, and there is no special discomfort. Some people may also have some numbness and weakness of the limbs and speech dysfunction. Such sequelae are often due to over-perfusion and cerebral infarction after bypass surgery. This aspect requires aggressive treatment to improve circulation, nutritional protection, and other appropriate treatments. Other people may develop epilepsy, which is mainly caused by interfering with the normal discharge process in the skull. Therefore, each person’s condition is different, and the protocols practiced for bypass surgery are also different, and must be judged on a case-by-case basis.