A hernia happens when part of an internal organ or tissue bulges through a weak area of muscle. Most hernias are in the abdomen.

There are several types of hernias, including

• Inguinal, in the groin. This is the the most common type.
• Umbilical, around the belly button
• Incisional, through a scar
• Hiatal, a small opening in the diaphragm that allows the upper part of the stomach to move up into the chest.
• Congenital diaphragmatic, a birth defect that needs surgery

Hernias are common. They can affect men, women, and children. A combination of muscle weakness and straining, such as with heavy lifting, might contribute. Some people are born with weak abdominal muscles and may be more likely to get a hernia.

Treatment is usually surgery to repair the opening in the muscle wall. Untreated hernias can cause pain and health problems.

A hernia occurs when an organ, intestine or fatty tissue squeezes through a hole or a weak spot in the surrounding muscle or connective tissue. Hernias often occur at the abdominal wall.  Sometimes a hernia can be visible as an external bulge particularly when straining or bearing down.

The most common types of hernias are:

• Inguinal: occurs in the inner groin
• Femoral: occurs in the upper thigh/outer groin
• Incisional: occurs through an incision or scar in the abdomen
• Ventral: occurs in the general abdominal/ventral wall
• Umbilical: occurs at the belly button
• Hiatal: occurs inside the abdomen, along the upper stomach/diaphragm

Most hernias are caused by a combination of pressure and an opening or weakness of muscle or connective tissue. The pressure pushes an organ or tissue through the opening or weak spot. Sometimes the muscle weakness is present at birth but more often it occurs later in life. Anything that causes an increase in abdominal pressure can cause a hernia, including obesity, lifting heavy objects, diarrhea or constipation, or persistent coughing or sneezing. Poor nutrition, smoking, and overexertion can weaken muscles and contribute to the likelihood of a hernia.

Usually, the wall of the abdomen is strong. The muscles keep your intestine in place. But if there’s a weak spot, the intestine can push through and form a hernia. A person may be born with a weakness there, or the weakness may develop over time later in life.

“It’s like when you look at an old tire on a car and you see kind of a bulge on the sidewall of the tire. That’s because there’s a weakness in the wall of the tire. And the air is pushing the wall of the tire outward to create that bulge,” says Dr. Dana K. Andersen, an NIH hernia expert.

A hernia developing in the abdomen is extremely common. Babies, children, and adults get them. Most of the time, hernias are found in men over 40. Can lifting heavy objects give you a hernia? Maybe if you already have a weakness in the wall of your abdomen.

“The majority—three-quarters—of abdominal wall hernias are in the groin,” Andersen says. The groin region is the lower abdomen.

The first sign of a hernia is a small bulge from the lower abdomen. You may notice it only when you stand up, cough, jump, or strain. That’s because those activities increase the pressure within your abdomen. That increased pressure can make a part of your intestine pop out of an area of weakness. When you lie down, the bulge may go away.

If you think you may have a hernia, ask your doctor. A doctor can usually detect a hernia during a physical exam. Your doctor can rule out other conditions that cause bulges or lumps.

If the bulge is very soft, your doctor may be able to massage the intestine back into the abdomen. A small, soft hernia that does not cause pain may not need treatment right away. The doctor may suggest watching and waiting for changes, like pain, to develop. If a hernia is painful or large, your doctor may suggest you see a surgeon for advice. You may need surgery to repair the hernia.

If your doctor can’t massage the intestine back into the abdomen, that means it’s trapped. A trapped intestine is dangerous because its blood supply can be cut off or strangulated.“The rim of the defect is forming a sort of a noose around the abdominal contents,” Andersen explains. “If that noose is tight enough so that the loop of intestine can’t be eased back through the defect, then the concern is that the intestine itself could be injured by strangulation.”

A strangulated hernia can be very serious and even life threatening. Symptoms include severe pain that doesn’t go away, nausea, and vomiting.

Surgery is usually needed if the intestine is trapped—and emergency surgery if it’s strangulated. A hernia is one of the most common reasons for surgery in the United States. “It’s a successful and low-risk procedure done about 800,000 times a year in the United States,” Andersen says.

If you think you may have a hernia, talk with your doctor. And check out the tips how to keep a hernia from getting worse. Keep in mind that anyone with sudden pain in the groin should immediately seek medical help.

If you have a hernia, try to keep it from getting worse:

• Avoid heavy lifting when you can. Lifting puts stress on the groin.
• When you must lift, don’t bend over. Lift objects by using the legs, not the back.
• Eat high-fiber foods and drink plenty of water. This helps prevent constipation and straining during bowel movements.
• Maintain a healthy body weight.

Hernia repairs are common—more than one million hernia repairs are performed each year in the U.S. Approximately 800,000 are to repair inguinal hernias and the rest are for other types of hernias.

• Non-Surgical
  • Watchful Waiting - Your surgeon will watch the hernia and make sure that it is not getting larger or causing problems. Although surgery is the only treatment that can repair hernias, many surgical procedures are elective for adult inguinal hernias. Watchful waiting is an option for people who do not have complications or symptoms with their hernias, and if recommended by their surgeon.
• Surgical
  • Laparoscopic - The surgeon makes several small incisions in the abdomen that allow surgical tools into the openings to repair the hernia. Laparoscopic surgery can be performed with or without surgical mesh.
  • Open Repair - The surgeon makes an incision near the hernia and the weak muscle area is repaired. Open repair can be done with or without surgical mesh. Open repair that uses sutures without mesh is referred to as primary closure. Primary closure is used to repair inguinal hernias in infants, small hernias, strangulated or infected hernias.

Hernias have a high rate of recurrence, and surgeons often use surgical mesh to strengthen the hernia repair and reduce the rate of recurrence. Since the 1980s, there has been an increase in mesh-based hernia repairs—by 2000, non-mesh repairs represented less than 10% of groin hernia repair techniques.

The use of surgical mesh may also improve patient outcomes through decreased operative time and minimized recovery time. However, recovery time depends on the type of hernia, the surgical approach, and the patient’s condition both before and after surgery.

Information found in medical literature has consistently demonstrated a reduced hernia recurrence rate when surgical mesh is used to repair the hernia compared to hernia repair without surgical mesh. For example, inguinal hernia recurrence is higher with open repair using sutures (primary closure) than with mesh repair.

Despite reduced rates of recurrence, there are situations where the use of surgical mesh for hernia repair may not be recommended. Patients should talk to their surgeons about their specific circumstances and their best options and alternatives for hernia repair.