Okay, so my 2 1/2 year old son has been potty trained or at least pee trained for 6 weeks now and has been wearing underwear all day. He only wears a pull-up at night. He must be afraid to poop on the potty or maybe it hurts, not sure, but he will not poop on the potty. He did poop in the potty twice the first week he was in his underwear and hasn't gone since. For the first couple weeks he would wait until we put his pull-up on at night and go then. Now he won't go at all and just holds it in. He cries and keeps telling me his tummy and his rear end hurt, yet he won't let it out. My pedi recommended putting a pull-up on him when he needs to poop. Not sure if this is the best approach or not. I'm afraid since he has been doing so well with the underwear that it might give him the wrong message that it is okay to go in his pants and confuse him that he has to pee in potty, but he can poop in diaper. I have heard of some parents using Miralax or Benefiber. Anyone else experience this? What did you do and how effective was it? How long after were they pooping regularly in potty. Thanks. Sorry for the novel.