Anal fistula is mostly caused by recurring abscesses around the anal canal. Surgery is the main treatment for this disease, and there will be pain after surgery, especially from the time when the surgical anesthesia wears off to one week after surgery, with the most pain usually occurring around the fifth to seventh day. The purpose of the surgery is to remove the lesion, relieve symptoms and protect anal function, etc. After the operation, after the anesthetic disappears, the patient obviously feels the pain in the anal area suffocating, at this time the pain, you can take oral painkillers such as ibuprofen extended-release capsules, which can stop the pain. Subsequent days of daily medication, such as patients with pain, can be localized with Ma Yinglong musk hemorrhoid cream, bear bile hemorrhoids Ling Ling embolism and other drugs to relieve. The fifth to seven days after surgery is the most painful time, at this time the incision site began to have granulation tissue generation, began to peel off the scabs, fall off the scabs, when the anal sphincter muscle contraction, feces from the wound site through, will cause repeated bleeding and pain, stimulate the patient’s pain threshold, the pain in these two days is the most pronounced, in addition to oral painkillers, can be given locally with lidocaine gel to relieve pain. Therefore, after surgical treatment, you should always keep your bowels open, ensure that the wound is clean and hygienic, wash more to prevent infection, and consult your physician promptly if there is any discomfort. Drugs should be applied under the guidance of the doctor.