An inguinal hernia will not go away without surgery. Most hernias in children are indirect (the abdominal tissue has bulged down the inguinal canal). These hernias need to be repaired because they are likely to become incarcerated.
Prompt surgery is needed for younger children especially, because they may not complain about pain until there is a risk of the intestine becoming tightly trapped and its blood supply being cut off (strangulation).
Surgery to repair an inguinal hernia needs to be postponed in infants who have any of the following conditions:
WebMD Medical Reference from Healthwise