My son is 3 yrs old, will be 4 in 3 mo he knows how to use the potty and knows where he must go to use the potty. Recently, he has gone to peeing in his room especially around the door and foot of his bed. The only thing that concerns me is that he is picking a choosing when he wants to pee in his room and when he wants to pee on the potty. I have asked him why he pees in his room and he just says i dont know, and when i ask him where he is supposed to potty he tells me plain as day in the potty in the bathroom. I am at my witts end because we have taken things away, we have punished him, everything to get him to stop but it seems to be getting worse, and it even seems as if now not only is he just pulling his pants down and peeing on the floor but he is always peeing in his underwear, please if i can get any advise it would be much appreciated..
Since the situation for you over potty training and accidents has now become emotionally charged, I would put your son into pull-ups for now and let the matter rest for a while. Making him feel like a bad boy will only make him more anxious, and therefore less able to change his behavior or to talk it over with any kind of rationality. (Which is a lot to expect at 3 anyway.) Let the issue defuse ... not having to worry about him peeing in his room or his clothes will de-stress you even if you are tired of changing diapers.
Talk to his pediatrician, and look up potty training references on the web. Go onto Amazon and get the book (written for you) about potty training that looks best, as well as some books (for him) about going potty.
One other suggestion is that if you're lucky enough to have some setting in which he will reliably stay dry (my son never peed in his diapers or pull-ups when he was with a particular babysitter because he didn't like the way she changed his diapers), put him on the potty immediately upon leaving that situation while he still has the sensation of a full bladder but before he has peed in his pull-up. He might make the connection that a full bladder signals it is time to head for the toilet. Once he has that, the rest is all downhill.