Anesthesia methods commonly used for anal surgery include local anesthesia, sacral canal anesthesia, saddle anesthesia, and epidural anesthesia. 1.Local anesthesia is referred to as local anesthesia Anesthesia method that applies drugs to temporarily block nerve conduction in a certain area of the body; it is suitable for hemorrhoids, anal fissures, prolapse; simple anal fistula and other anorectal disease surgery. Local anesthesia is the most commonly used anesthesia method in the anorectal department, which is easy to operate, low cost, safe, and practical. 2.Sacral canal anesthesia is an anesthesia method to inject anesthetic drug into the sacral canal through the sacral fissure to produce anesthesia in the anal perineum, and sacral anesthesia can be used for all anal, perianal and lower rectal surgeries. This kind of anesthesia is effective and safe, but because the location of the sacral fissure often varies from person to person, so the operation is sometimes very unpleasant. 3.Saddle anesthesia is referred to as saddle anesthesia or lumbar anesthesia The anesthetic drug is injected into the subarachnoid cavity from the lumbar spine to produce saddle anesthesia effect in the perineum. The advantage of saddle anesthesia is that muscle relaxation is excellent, and the scope of anesthesia is larger than the root pair; it is suitable for all anorectal surgery in the perineum, but because of the higher anesthesia plane, pregnant women, children, cardiovascular system pathology, renal insufficiency and other patients should not be used. 4.Epidural anesthesia is referred to as epidural anesthesia Anesthesia method in which anesthetic drugs are injected into the epidural cavity to produce anesthesia in a section of the trunk. Its advantages are large anesthesia range and long anesthesia time, which is suitable for patients with long surgery time such as rectal cancer and sphincteroplasty. This anesthesia method is technically demanding, relatively complicated to operate, and has certain risks.