My granddaughter had the same thing. Her pediatrician said that the hernia usually goes away by the time the baby is a year old. She said that the baby is still developing after she's born and that her body will take care of it. It was true. The belly button was normal by the time she was a year and a half. She's 8 now and her belly button is perfect and as the other mother said, cute as a button. Her abdominal wall is strong. She's very physically active.
The pediatrician was so good at reassuring her mother that she didn't worry about it. The pediatrician did say that she would consider surgery at her one year check up. She didn't bring it up at that appointment and I'd forgotten about it and so didn't ask. A couple of months later her belly button looked more normal and by 18 months was normal.
One thing I remember which helped me not be worried was that the pediatrician said a hernia of this type in an infant at is not as serious as a hernia in an adult because the baby is still developing and the baby will most likely mend the muscle while still young.
I found several articles by googling "infant umbilical hernia." Those sites said that surgery isn't usually performed until the child is 4 or 5 and still has the hernia.
Here is a site that seemed to summarize the condition best. www.healthsystem.virginia.edu/uvahealth/peds_
newborn/umbilical.cfm
I can't get the address line to wrap onto two lines. However the rest of the address is on the second line in black. There is an underline between peds and newborn that isn't obvious since the address is underlined. (like this peds_newborn)
I don't understand why they put hernias under high risk newborns unless it's because preemies have more risk for developing a hernia.
I'd suggest that you whenever you think of this as a condition to worry about that you tell yourself that he will be OK. As hard as it may be, focus on the positive. There is nothing that you can do to change it.