Anal pain caused by defecation should first find the cause and then deal with it. The more common cause is due to diet, mainly eat spicy food caused by anal burning, pain, adjust the diet after the symptoms can be relieved. It may also be anal fissure, mainly because the stool is harder and thicker, resulting in anal tear and cause, the pain is more intense, sometimes accompanied by a small amount of bleeding, you can apply hemorrhoidal suppository or hemorrhoidal ointment for treatment. If there is no relief after treatment, it is best to find a specialist for diagnosis. In addition, the pain is accompanied by pus and blood and changes in bowel habits, perianal abscesses and malignant lesions should be excluded, and all should be treated under the examination of a specialized physician.