Recovery from anal fissure surgery usually takes about half a month, but the specific time needs to be judged according to the actual situation of the patient. The etiology of anal fissure is still unclear, it may be due to constipation, diarrhea, anatomical defects and other factors that lead to the local anal canal mucosa and sphincter muscles bursting, forming fissures and ulcers; generally speaking, patients will gradually recover in half a month or so after taking the surgery, but there are some differences in the specific time due to the influence of individual physique, postoperative recovery and other factors. If patients do not pay attention to keep the local cleanliness after the operation, when infection occurs, it may lead to the prolongation of the recovery time. Therefore, it is suggested that patients should pay attention to clean the perianal skin regularly after the operation, change the medicine locally, and take 1:5000 potassium permanganate solution sitz bath under the guidance of the doctor when necessary to promote the recovery of the condition. After the operation, patients with anal fissure should pay attention to proper rest, go to the hospital regularly for review, and if there is any abnormality, deal with it in time.