The most reliable sign of a hernia is a soft bulge or lump that appears in your groin, belly, or near your navel, especially when you cough, strain, or stand up. It often disappears or flattens when you lie down or gently press on it. But not all hernias produce a visible bulge, particularly in women, which means you may need to pay attention to subtler symptoms like a burning sensation, unexplained groin pain, or persistent heartburn.
Hernias are common. They affect roughly 15% to 20% of the general population, and men face a 27% lifetime risk of developing an inguinal (groin) hernia compared to about 3% for women.
What a Hernia Feels and Looks Like
A hernia happens when tissue, usually part of your intestine or abdominal fat, pushes through a weak spot in the surrounding muscle wall. The classic sign is a bulge you can see or feel under your skin. It tends to be soft, not hard, and it may change size throughout the day. You’ll likely notice it more when you’re standing, lifting something heavy, coughing, or straining during a bowel movement. When you lie down and relax, it often shrinks or disappears entirely.
Along with the bulge, you may feel discomfort, heaviness, or a burning sensation in the area. The pain is usually dull and achy rather than sharp, though it can sharpen with activity. These symptoms typically get worse the longer you’re on your feet and improve with rest.
Where Hernias Show Up
The location of the bulge tells you a lot about the type of hernia you’re dealing with. The most common types include:
- Inguinal hernia: A bulge in the groin, between your lower abdomen and thigh. In men, this can extend into the scrotum. About 90% of groin hernia repairs are performed on men.
- Femoral hernia: A smaller bulge that appears just below the groin crease, closer to the upper thigh. These are more common in women, who account for about 70% of femoral hernia repairs.
- Umbilical hernia: A bulge at or near the belly button.
- Incisional hernia: A bulge along the scar line from a previous abdominal surgery.
Inguinal hernias can slide in and out of the abdominal wall, which is why they seem to come and go. This doesn’t mean the hernia has healed. The weak spot in the muscle is still there.
Hernias You Can’t See
Not every hernia produces a visible lump. A hiatal hernia occurs when part of your stomach pushes up through your diaphragm into your chest cavity. There’s nothing to see or feel on the outside. Instead, the symptoms mimic acid reflux: heartburn, difficulty swallowing, a dry cough, bad breath, nausea, and even tooth erosion from stomach acid. Most people discover they have a hiatal hernia only when they’re being tested for persistent heartburn, chest pain, or unexplained stomach discomfort.
Why Hernias Are Harder to Spot in Women
Women with hernias often don’t develop an obvious bulge, especially with groin hernias. Their symptoms tend to be aching or sharp pain, a burning sensation, and discomfort that increases with activity. Because these symptoms overlap with gynecological conditions like ovarian cysts or endometriosis, hernias in women are frequently missed or misdiagnosed. Johns Hopkins Medicine notes that many experts believe women are significantly underdiagnosed for this reason. If your doctor suspects a hernia but can’t confirm it through a physical exam, an MRI can provide a definitive answer.
How to Check Yourself
You can do a basic self-check at home. Stand in front of a mirror in a well-lit room and look at your groin and abdomen. Relax first, then cough firmly and watch for any bulge or unusual movement under the skin. Repeat this while gently pressing your fingertips over the groin area on each side, just above the crease where your leg meets your torso, and near your belly button. A hernia will often produce a noticeable push or impulse against your fingers when you cough.
For men, another method involves gently inverting the skin of the scrotum with your index finger and sliding it upward into the inguinal canal alongside the cord structures. Cough, and feel for any bulge pressing against the side or tip of your finger. This is essentially the same exam a doctor performs during a physical, when they ask you to turn your head and cough.
A self-check can catch an obvious hernia, but it has limits. Small hernias and those deep in the groin may not be detectable by feel alone.
Hernia vs. Other Lumps
Finding a lump in your groin or abdomen doesn’t automatically mean it’s a hernia. Several other things can cause bumps in the same areas, and the differences are fairly straightforward to identify.
A hernia is soft, changes size with position or straining, and often disappears when you press on it or lie down. A lipoma (a benign fat deposit) is smooth, rubbery, dome-shaped, and easy to move under the skin, but it doesn’t change with coughing or lying down. A cyst is a fluid-filled sac that may be tender and stays the same size regardless of what you’re doing. A swollen lymph node feels firm, is usually tender, and typically signals an infection or illness. Cancerous lumps tend to be hard, irregularly shaped, and firmly fixed in place, though they’re rare.
The key distinguishing feature of a hernia is that it responds to pressure and position changes. If the lump gets bigger when you cough and smaller when you lie down, that’s a strong indicator.
How Doctors Confirm a Hernia
Most hernias are diagnosed through a straightforward physical exam. Your doctor will have you stand, then cough or bear down while they feel for a bulge in your groin or abdomen. This simple test catches the majority of hernias.
When the physical exam is inconclusive, imaging comes next. Ultrasound is generally the preferred first-line imaging tool for suspected hernias. A systematic review of diagnostic studies found that ultrasound had higher sensitivity and specificity than CT scans or MRIs for detecting inguinal hernias, though its accuracy depends heavily on the skill of the person performing it. CT scans may be used when there’s concern about complications or when ultrasound results are unclear. MRI is particularly useful for detecting small or hidden hernias in women.
What Raises Your Risk
Hernia risk follows a bimodal pattern in men, peaking in the first year of life and again after age 40. The most common risk factor is regularly lifting heavy weights, which was present in 55% of patients in one large study. Chronic constipation or straining during bowel movements, chronic cough from respiratory disease, smoking, and diabetes also increase your risk.
Interestingly, obesity is not the risk factor you might expect. Studies have actually shown that the incidence of inguinal hernias decreases in overweight and obese patients, possibly because extra abdominal fat puts pressure on the inguinal canal from the inside.
When a Hernia Becomes an Emergency
Most hernias are not dangerous, but they can become so. If a hernia gets stuck outside the abdominal wall and can’t be pushed back in, it’s called incarcerated. At this stage, blood is still flowing to the trapped tissue. But if the surrounding muscles squeeze tightly enough to cut off blood supply, the hernia becomes strangulated, and the trapped intestine can start to die in as little as four hours.
The warning signs of strangulation are distinct from ordinary hernia discomfort:
- Sudden, severe pain in the abdomen or groin that keeps getting worse
- Nausea and vomiting
- Skin color changes around the bulge, first becoming paler, then turning reddish or darker than usual
- A bulge that won’t flatten when you lie down or press on it
This is a 911 situation. Strangulated hernias require emergency surgery.
Do All Hernias Need Surgery?
Not necessarily. If you have a hernia that causes little to no discomfort and easily slides back in, watchful waiting is a reasonable option. High-quality clinical trials have shown that the complication rate for asymptomatic hernias managed without surgery is very low: roughly 1.8 episodes of incarceration per 1,000 patient-years of follow-up. That said, about 25% of people who initially chose watchful waiting opted for surgery within two years because their symptoms eventually worsened.
Hernias that cause noticeable symptoms are generally treated with surgical repair. Hernias don’t heal on their own because the muscle weakness that caused the opening doesn’t close. Over time, the hernia may grow larger and become harder to repair.