Hello, my son is 2 1/2 yrs old, and tonight while he was asleep, he was crying in pain, his tummy felt hard and he was holding his penis. I thought he had a tummy ache, so I picked him up and stood him up on the floor and he peed in his diaper. once he peed, he was all better and went back to bed as if nothing ever happened. Is it normal for a child to wake up in pain, just to pee?? Thank you!