A common question asked by patients undergoing “microvascular decompression” for cranial nerve disorders such as facial spasm is “what should I do before surgery or what should I pay attention to”. Because this is an extremely delicate microsurgical cranial surgery, it is now common international practice to perform the surgery under general anesthesia to ensure patient safety. Only when the patient is under general anesthesia will the patient be “motionless”, and even the vital signs such as heart rate, respiration and blood pressure will be controlled in a very stable state, so that the surgeon can give full play to his excellent medical skills to relieve the patient’s pain while ensuring the patient’s safety. Patients with chronic diseases such as hypertension, diabetes and heart disease should pay attention to the fact that they should be controlled with medication for a certain period of time before undergoing surgery under the proper guidance of a local professional internist. 2.Patients taking angiotensin-converting enzyme inhibitors (such as captopril), reserpine, and anticoagulant drugs should stop taking them for at least 1 week. 3.Cure the cold or other infectious diseases before undergoing surgery. 4.Women cannot receive surgery during their menstrual period.