My 4 year old son will not do a pooh. He holds it back for days (sometimes more than week) and refuses to relax and let it go, until neccesity means he can´t control it. He seems to be scared of the act of doing a pooh - he says his tummy hurts and he doesn´t want it to come out. Obviously with every day it becomes even more uncomfortable. When he does go he doesn´t like it and gets very, very upset and almost agressive. In the meantime he messes his pants but that doesn´t worry him, and his behaviour gets more moody especially when he is forcing himself to stop the feeling of wanting to go. In all other respects he is a happy active boy who loves school and apparently has no other problems, and he gets on well with his 7 year old brother. Almost a case of Jeckyl and Hyde! The only thing that might affect him is that his Dad is away all week working but that has been going on for years and his behaviour does not change when Dad is home at the weekends. We have tried all sorts of the normal incentive plans to try and encourage him to go every day, and things to get him to relax, but he isn´t interested. The books say it is a behavioural problem but we don´t know the cause. We are going to seek professional help. Does anybody know of a similar situation and how to deal with it?