A hernia is the protrusion of an organ through an abnormal opening in the tissue that normally encloses it.
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Hernia Means Rupture
The word hernia, in Latin, means rupture. A hernia refers to an opening, or separation, in the muscle, tissue, or membrane that normally holds an organ in place. This opening allows the organ to poke through the hole. Hernias may be caused by muscular weakness, heavy lifting, straining, illness, obesity, or pregnancy.
Hernias commonly occur in the groin, where they are called inguinal (ING-gwi-nal) hernias; in the belly button (umbilical hernias); in the chest, where they are called hiatal (hi-AY-tal) hernias; and in the abdomen (abdominal hernias).
The wall of the abdomen is made of thick muscle, but holes exist normally in certain places, such as the groin, through which structures such as blood vessels pass. Hernias usually occur when the intestines push out against these built-in weaknesses. Hernias may be dangerous if the protruding piece of intestine gets trapped and twisted, thus obstructing the flow of food and fluid through the intestine, and sometimes stopping blood supply to that part of the intestine.
Inguinal hernias are the most common type and are often visible as large lumps. Some people with inguinal hernias do not feel anything,
Another common type of hernia is a hiatal hernia. The esophagus, or food pipe, passes to the stomach through a gap in the diaphragm * called the hiatus (hi-AY-tus). A hiatal hernia occurs when the stomach pokes above the diaphragm into the chest. There are no visible bulges, but people have symptoms such as heartburn. Hiatal hernias do not necessarily require surgery. Often, lifestyle changes such as losing weight and avoiding smoking, drinking alcohol, and eating hot, spicy foods can make the symptoms go away.
Umbilical hernias are common in children. One out of five babies has one, but this type usually heals by itself
Abdominal, or intra-abdominal, hernias occur more rarely, when an organ in the abdomen pokes through membranes that normally hold it in place.
Do Children Get Hernias?
Karen loved taking care of her baby brother. One day when she was changing his diaper, she noticed he had a plum-sized bump along the inside of his thigh where it met his torso (his groin). When he cried, it got bigger, like a small balloon being blown up. It looked pretty strange, but he did not seem to be in any pain. Karen's parents took him to the doctor, who said the baby had an inguinal hernia.
The doctor explained that up to 5 percent of healthy babies are born with inguinal hernias, and 80 to 90 percent of children with this type of hernia are boys. These hernias occur because certain openings do not close after birth the way they should, allowing the intestine to bulge out of the hole. The doctor scheduled an operation so that he could surgically repair the baby's hernia, but he assured Karen's parents that the surgery was a safe and common procedure.
Babies also sometimes have umbilical hernias, but these usually heal on their own without surgery.
* diaphragm (DY-a-fram) is the muscle that separates the chest and abdominal cavities. It is the chief muscle used in breathing.
The U.S. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) posts fact sheets about inguinal hernia and hiatal hernia at its website.
Fact sheet about inguinal hernia may be found at URL
Fact sheet about hiatal hernia and its relation to gastroesophageal
reflux may be found at URL