My 9 yr old son was treated for Hirshprung's Disease at 8 months old. Since the procedure we've always had a problem with him pooping his pants. He has now resorted to lying about it, hiding the underwear, not cleaning himself properly, and just not telling anyone that he's messed himself. He does not respond to any punishment or praise. My wife and I have recently received custody of him and his sister. He has been diagnosed with ADHD, and his currently taking Concerta for this disorder. I am at my wits end. My next step is referring to a child psychologist to find out what may be an underlying problem since taking all of his toys, games, and other fun items away from him. When asked why he continues to mess himself he only answers "I don't know". Obviously this is not satisfactory with me. Can anyone help me?