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A wall of muscle holds the bowel (intestine) inside the abdomen (belly). A hernia occurs when a section of bowel pushes out through a weakness in the muscle. The hernia looks like a bulge under the skin. In baby boys, a bulge in the scrotum is the most common type of hernia and is the result of a persistent canal between the scrotum and abdomen that normally closes when a fetus is developing. A hernia can move back into the abdomen through the passage. So you may not see the bulge all the time. You may see it most when your baby is straining (such as during crying, feeding, or a bowel movement).
Any baby can have a hernia, but they’re most common in:
Preemies, because the abdominal muscle isn’t fully developed yet.
Boys, because it’s easy for a hernia to form in the space where the testicles descend.
Babies with lung disease, because they often strain to breathe.
An inguinal hernia occurs when a section of bowel extends into the groin area (the crease between the baby’s leg and abdomen). For boys, it could also extend into the scrotum. Surgery is usually needed to treat this type of hernia.
An umbilical hernia occurs when a section of bowel extends into a weak area around the bellybutton. This type of hernia often heals on its own.
In many cases, hernias aren’t dangerous. As long as the hernia can move back into the abdomen, it’s usually not a problem. But if the bowel becomes strangulated (stuck in the weak spot), the problem becomes more serious. The abdominal muscle squeezes the bowel, causing swelling. Blood flow to that part of the bowel may be reduced, and that portion of the bowel could rupture or die. In boys, blood supply to a testicle could be reduced, leading to damage or death of the testicle.
Not always. An inguinal hernia often requires treatment, but an umbilical hernia might get smaller over time. This can take 1 to 2 years. The doctor will keep an eye on it during this time to make sure the hernia doesn’t become strangulated. If a hernia is strangulated, it must be treated right away with surgery. In some cases the doctor may want to operate before the baby goes home from the hospital, even if the hernia isn’t strangulated yet.
Once a hernia goes away or is treated, many babies have no lasting problems. However, if a hernia is strangulated and blood supply is cut off, this could cause damage to the bowel or testicles. Talk to the doctor about how your baby is likely to progress.
Watch for the following signs to know if your baby’s hernia is strangulated. If you see any of these signs, alert your baby’s doctor or nurse:
The hernia doesn’t move back into the abdomen
Crying that can’t be consoled (this often means the baby is in pain)
Crying or fussing when you touch the hernia
Redness or blue discoloration in the groin, scrotum, or bellybutton (umbilicus)
A swollen, round abdomen (a sign that food isn’t passing through the bowel)