N.P.
It's a power struggle. Do you have another younger child that he could possibly be jealous of...? We went through this with my son who will be 4 in September. My son is all potty trained now but we went through a lot of poopy diapers to get there! I think you should give him back his diapers at night. That seems a bit cruel and you don't want him to hold it and get constipated. I hear this is awful and happens quite often to kids. What I would suggest is spending some extra time with your dear son reading or doing flash cards or drawing or playing games. It sounds as though he is upset about something and feels he's not getting the attention he wants. This is what I do with my son when he acts out. Whenever my son starts misbehaving, it always goes back to my husband and I being extra busy and not spending enough one on one time with him. It always works to spend more time with him. He'll cooperate better with you if he feels valued. Good luck.