Patient : Description of the condition (onset time, main symptoms, hospital visited, etc.): The child has congenital megacolon, has been operated, after surgery to dilate the anus, now more than a year, the child defecation time up to several hours, and a lot of times, the skin around the anus will appear “rotten” state, the number of times and after the application of ointment anus The skin around the anus heals quickly after applying ointment less frequently, but not more frequently? Is there a good way to treat it? I have used “Bactrim” ointment. Doctor: My experience is: when you have a lot of bowel movements, wash the area around your anus with water after each bowel movement, and then use a hair dryer to dry the area as soon as possible. I hope this helps.