Scar stenosis formed after anal fissure surgery, the degree of stenosis can not be judged by themselves, it is not recommended to operate on their own to expand the anus, which will cause infection and re-fissure. After anal fissure surgery inside the scar stenosis, you need to go to the regular hospital in time for diagnosis and treatment. After the narrowing, patients appear to have symptoms such as thinning of stool, pain or resistance feeling to defecation, bleeding and so on. Patients need to give reasonable standardized and targeted treatment after the diagnosis of professional doctors is clear. It is not recommended to dilate the anus by oneself, if it is not operated properly, it will cause injury or infection, or cause anal fissure again. Scar narrowing after anal fissure surgery, for the degree of narrowing of the planned regular expansion of the anus, the specific operation performed by a professional doctor, generally including finger expansion and mechanical expansion, mechanical expansion of the anus commonly used horn anal mirror and expand the anus stick, according to the needs of the disease to choose or gradually replace the size of different models of equipment, expand the anus time until the finger into the anus can be accommodated with three fingers, there is no sense of constriction, the therapeutic purpose can be achieved. Supplementation of appropriate fiber in the diet may have a certain auxiliary effect on mild stenosis, severe stenosis patients may need anoplasty, if necessary, lateral internal sphincterotomy, as prescribed by the doctor. Scarring stenosis formed after anal fissure surgery can be harmful to the patient’s body, and needs to be treated promptly in the hospital so that the symptoms can be relieved.