M.C.
We went through that with my son (now 15). Get a handle on it quick, because it becomes a huge ordeal. They think it's going to hurt, so they resist, but then it just builds up, until they can't hold it and then it hurts all over again. We had my son in the emergency room on a couple of occasions. What finally worked for us was to give him a stool softener (check w/your pharmacy) with a few slices of apple every night. You have to be diligent. We tried enemas of every kind, and the only thing that worked was the stool softener.