When you have a hernia, part of an internal organ or fatty tissue pushes through a weak spot in the muscle or connective tissue that normally holds it in place. This creates a bulge you can often see and feel, most commonly in the abdomen or groin. About 27% of men and 3% of women will develop the most common type (inguinal hernia) at some point in their lives, and over a million hernia repairs are performed in the U.S. each year.
What’s Actually Happening Inside Your Body
A hernia has two parts: the defect itself, which is a hole or weakness in the abdominal wall, and the hernia sac, which is a pouch of tissue that pushes through that hole. The sac may contain a loop of intestine, part of the colon, the bladder, or sometimes nothing at all. Think of it like a weak spot in an inner tube: pressure from the inside eventually forces something through.
That pressure can come from everyday activities. Straining during a bowel movement, lifting something heavy, persistent coughing, or even standing for long periods can push tissue through a spot that was already weakened by genetics, aging, previous surgery, or pregnancy. Some people are born with an opening that never fully closed, which is why hernias sometimes appear in infants.
How a Hernia Feels
The most obvious sign is a bulge. With an inguinal hernia (the groin type), you’ll notice a lump on either side of your pubic bone that becomes more visible when you stand up, cough, or strain. You can usually feel it by pressing your hand over the area. Many people describe a burning or aching sensation at the bulge, along with pressure or discomfort in the groin when bending over, coughing, or lifting.
In men, a protruding loop of intestine can descend into the scrotum, causing pain and swelling around the testicles. Some hernias cause no pain at all, at least initially. You might only notice the bulge and be able to push it back in when you lie down. Others cause a dull, heavy ache that worsens throughout the day as gravity pulls on the protruding tissue.
Hiatal hernias are different. They happen when part of your stomach pushes up through your diaphragm into your chest cavity. You won’t see a visible bulge. Instead, the main symptoms are acid reflux and heartburn. When the junction between your esophagus and stomach shifts upward, the muscles that normally prevent stomach acid from washing back up can’t tighten properly. The hernia also traps a pocket of acid at the top of your stomach that can’t drain away.
The Different Types and Where They Appear
- Inguinal hernia: A bulge in the groin, by far the most common type
- Femoral hernia: Appears in the upper thigh, more common in women
- Umbilical hernia: Shows up near the belly button, common in newborns and pregnant women
- Incisional hernia: Develops along a scar from previous abdominal surgery
- Hiatal hernia: Abdominal tissue pushes up through the diaphragm into the chest
- Epigastric hernia: Develops in the upper abdominal area, between the belly button and chest
When a Hernia Becomes Dangerous
Most hernias are uncomfortable but not immediately dangerous. The situation changes if the hernia becomes trapped. An incarcerated hernia means the tissue is stuck in the abdominal wall and can’t be pushed back in. Blood still flows to the trapped tissue, but the hernia won’t go away on its own.
A strangulated hernia is a medical emergency. This happens when blood supply is cut off to the trapped tissue. The intestine caught inside the hernia can begin to die in as little as four hours. Symptoms of strangulation include sudden, severe pain that keeps getting worse, nausea and vomiting, and skin color changes around the bulge (it may turn reddish, then darker than usual, or go pale). If you notice these signs, call 911. This requires emergency surgery.
How Hernias Are Diagnosed
Most hernias are diagnosed with a physical exam. Your doctor will look at and feel the area, often asking you to stand and cough so the bulge becomes more visible. For groin hernias that are hard to confirm by touch alone, a CT scan of the abdomen and pelvis is the standard imaging tool. An MRI or ultrasound may also be used depending on the hernia’s suspected location. Hiatal hernias are typically found during imaging or endoscopy done for acid reflux symptoms.
Watching and Waiting vs. Surgery
Not every hernia needs immediate surgery. If your hernia is small and causing little to no discomfort, your doctor may recommend monitoring it over time. Research on this approach shows it’s generally safe for people with minimal symptoms. The catch: watchful waiting tends to delay surgery rather than avoid it. Most people with inguinal hernias eventually develop enough symptoms to need a repair.
Surgery becomes necessary when the hernia is painful, growing, or at risk of complications. It’s the only way to actually fix a hernia. Hernias don’t heal on their own because muscle and connective tissue can’t regenerate across a gap.
What Hernia Surgery Looks Like
There are two main approaches. Open surgery involves a single larger incision over the hernia, where the surgeon pushes the protruding tissue back into place and reinforces the weak spot, usually with synthetic mesh. Laparoscopic surgery uses several small incisions and a camera to guide the repair from inside. Robotic-assisted surgery is a variation of the laparoscopic approach.
Laparoscopic and robotic procedures generally cause less scarring, require fewer pain medications, and have a quicker recovery. Open surgery is sometimes the better option for larger or more complex hernias. For hiatal hernias, the surgeon wraps the upper part of the stomach around the lower esophagus and secures it with stitches or staples, which tightens the muscle that keeps acid from washing upward.
About 16% of people need a second surgery because their hernia returns within 10 years of the first repair. Laparoscopic surgery may carry a slightly higher recurrence risk compared to open repair.
Recovery After Surgery
Most people can walk the day after hernia surgery. You can typically return to a desk job within one to two weeks, though physically demanding work that involves lifting may require a few more weeks off. Driving is usually fine once you’ve stopped taking prescription pain medication for at least two days.
There are no strict medical restrictions on activity after an open inguinal hernia repair. Walking, climbing stairs, mowing the lawn, and exercise are all fine as long as they don’t cause pain. The general guideline is to let discomfort be your guide: if something hurts, ease off.
Short-term side effects can include fluid collection at the incision site, bruising, and temporary difficulty emptying your bladder. Infection at the incision is possible but uncommon. In men, groin hernia repair carries a small risk (0.3% to 7.2%) of complications affecting the testicles due to nearby nerve and blood vessel damage. Chronic pain lasting beyond three months occurs in a small percentage of patients, though pain that significantly affects quality of life doesn’t exceed about 4% of cases.
Mesh Complications
Most hernia repairs use synthetic mesh to reinforce the weak spot and reduce the chance of recurrence. The FDA monitors mesh safety and has received over 55,000 adverse event reports related to hernia mesh over a 22-year period. The most commonly reported problems are pain, infection, adhesions (where tissue sticks to the mesh), and the need for additional surgery. Mesh erosion or breakdown can also occur after recovery, though it’s uncommon.
In clinical studies, mesh infection rates range from 1% to 1.4%, hernia recurrence with mesh ranges from 0% to 11%, and serious bowel complications like obstruction or fistula formation each stay below 4%. These numbers span many types of mesh and surgical techniques, so individual risk varies based on the specific procedure and surgeon experience.