A hernia typically looks like a soft bulge or lump under the skin, most commonly in the groin, belly button, or along a surgical scar. The bulge may be as small as a grape or large enough to be immediately noticeable, and its most distinctive feature is that it changes size depending on your position and activity. Understanding what different types of hernias look like can help you recognize one early.
The Classic Hernia Appearance
The hallmark of a hernia is a soft, squishy lump that pushes outward from beneath the skin. Unlike a swollen lymph node or cyst, which tends to feel firm and stays the same size regardless of what you’re doing, a hernia bulge grows larger when you stand up, cough, sneeze, or strain. Gravity pulls the protruding tissue outward, so many people notice the bulge gets more prominent throughout the day and seems to disappear overnight while they sleep.
Most hernias are “reducible,” meaning you can gently push the bulge back in with your hand, or it slides back on its own when you lie down. This back-and-forth quality is one of the easiest ways to distinguish a hernia from other lumps. The skin over the bulge usually looks normal in color and texture when the hernia is uncomplicated.
Groin Hernias
Inguinal hernias, the most common type, appear as a soft lump in the groin area or, in men, can extend down into the scrotum. The bulge sits near the crease where your thigh meets your abdomen. It becomes more visible when you cough, bear down, or stand for long periods. In women, inguinal hernias are less likely to produce a visible bulge and may instead cause a vague aching sensation in the groin without an obvious lump.
Femoral hernias look similar but sit in a slightly different spot. They appear just below the groin crease, in the upper inner thigh. These are far less common and occur more frequently in women. Because of their location, femoral hernias can be mistaken for swollen lymph nodes, but the key difference is that a hernia bulge changes size with position and strain, while a lymph node stays relatively fixed and tends to feel firmer.
Belly Button Hernias
An umbilical hernia creates a soft swelling or bulge at or near the navel. In adults, it looks like the belly button is pushing outward, sometimes forming a rounded dome that’s most visible when standing or straining your core muscles. In infants, the hernia may only be noticeable when the baby cries, coughs, or strains, causing the belly button to protrude noticeably. When the baby relaxes, it often flattens back out completely.
Many parents notice their newborn’s belly button sticking out and worry something is seriously wrong. Most infant umbilical hernias close on their own by age 3 to 4 without treatment. In adults, they don’t resolve spontaneously and tend to grow slowly over time.
Hernias Along Surgical Scars
Incisional hernias develop at the site of a previous abdominal surgery, where the muscle wall was cut and may not have healed at full strength. They look like a bulge or lump forming near or along the scar line. A small incisional hernia may not be visible at all and might only be detected on imaging. Larger ones, particularly those wider than about 4 inches (10 cm), can create an obvious protrusion and tend to cause pain, ranging from a dull ache to a sharp sensation that worsens with lifting, coughing, or sneezing.
Like other hernias, the bulge is more noticeable when you stand up or tighten your abdominal muscles. It may flatten or disappear when you lie on your back.
What a Hernia Does NOT Look Like
Hernias are sometimes confused with other lumps under the skin, so it helps to know the differences. A swollen lymph node feels firm or even hard, is typically tender when infected, and does not change size when you cough or change positions. A lipoma (fatty lump) is usually rubbery, moves slightly under the skin when pressed, but again doesn’t respond to straining or gravity. An abscess is red, hot, and painful to the touch.
The defining trait of a hernia is its responsiveness to pressure and position. If you can push a lump back in and it pops out again when you stand or cough, that behavior is highly characteristic of a hernia.
Warning Signs That Change How It Looks
An uncomplicated hernia has normal-colored skin over the bulge and can be pushed back in without much trouble. When a hernia becomes incarcerated (stuck) or strangulated (its blood supply gets cut off), its appearance changes in important ways.
The bulge becomes firm or hard instead of soft, and you can no longer push it back in. The skin over and around the lump may turn red or darker than your normal skin tone. In a strangulated hernia, the skin can first become pale, then progress to a darker, purplish discoloration as the trapped tissue loses blood flow. This is accompanied by severe pain, nausea, vomiting, or fever. A hernia that suddenly looks discolored, feels hard, and won’t go back in is a surgical emergency.
How Doctors Confirm What You’re Seeing
In many cases, a doctor can diagnose a hernia just by looking at and feeling the bulge while asking you to cough or bear down. The “cough impulse,” where the lump visibly expands when you cough, is a classic physical exam finding.
When the hernia is small or not easily visible, an ultrasound can confirm the diagnosis. The imaging looks for tissue or intestine pushing through the muscle wall, measures the size of the opening in the muscle, and checks whether the opening widens when you bear down. This is particularly useful for people who have groin pain but no obvious bulge, or when the doctor needs to distinguish a hernia from another type of lump.