Anesthesia for anal fistula is commonly used as local anesthesia, sacral anesthesia, lumbar anesthesia and epidural anesthesia. Anal fistula is one of the common diseases of anal and intestinal diseases, is the perianal abscess for a long time not to heal the formation of the rectum and the outside world due to the channel, surgery is the most effective means of treatment of the disease. And the anal area is distributed with a large number of rich nerve endings, according to different conditions to choose the appropriate anesthesia. 1. Local anesthesia is to inject anesthetic drugs into the surgical area, through the blockage of the regional nerve to achieve the effect of anesthesia, mainly for low anal fistula, it is easy to operate, high security, fewer complications and other advantages. 2. Sacral anesthesia is the anesthetic drug injected into the sacral lumen, through the blockade of sacrococcygeal nerve conduction to achieve the effect of anesthesia, mainly used for anal perineum and lower rectal surgery, easy to operate, small anesthetic range, small dose of medication, the effect is good, the anal sphincter relaxation is good, and provide a clear vision of the operation and other advantages. 3. Lumbar anesthesia is the injection of anesthetic drugs in the subarachnoid space in the spinal canal, the drug can only be played once, more suitable for short surgery, such as simple anal fistula, puncture site should be well mastered to avoid injury to the nerve. 4. Epidural anesthesia is the injection of anesthesia drugs in the spinal canal in the epidural cavity, in this cavity to stay an epidural catheter, can be additional anesthesia drugs through the catheter, suitable for surgery lasts a long time, more than 2 hours to achieve better anesthesia, such as high-level complex anal fistula surgery can choose epidural anesthesia. It is recommended that patients with anal fistula, once diagnosed, timely to the regular hospital, under the guidance of the doctor standardized treatment, so as not to delay the condition.