The most likely cause of pain in the anal area when wiping the buttocks after defecating is anal fissure, and it does not exclude the presence of anal dampness, forming small skin chaps, and possibly hemorrhoids prolapsed to form a blood clot, or edema, consider going to the local tertiary hospital’s anorectal department for an examination to clarify the diagnosis. If you have an anal fissure, you can take early conservative treatment with medication, you can use warm salt water to cleanse it and then use ointment to apply it. Pay attention to drinking more water, eating more fresh fruits and vegetables, eating less spicy and stimulating food, eating less fried food, minimizing the intake of high protein foods such as beef, mutton and seafood, and also trying to avoid fatigue and staying up late.