Simply an outie or a hernia?

My son had a hernia, when you push your belly on in your stomach, can you feel a hole? if so, its a hernia.. he had to have surgery, but they had to wait until he was 3. I wanted to cry one day, he was in the restroom with his older potty training brother, and he pulled off his diaper and stuck his belly on over the potty.. poor boy thought that was his !!