A hernia typically looks like a soft bulge or lump under the skin in a place where you wouldn’t normally have one. It can range from barely noticeable to the size of a golf ball or larger, and it often changes shape depending on what you’re doing. The bulge usually appears when you’re standing, coughing, or straining, and it may flatten or disappear entirely when you lie down and relax.
The skin over a hernia normally looks the same color as the surrounding area. Underneath, you’re seeing tissue, fat, or part of an organ pushing through a weak spot in the muscle wall. What the bulge looks like and where it shows up depends on the type of hernia.
Inguinal Hernia: Bulge in the Groin
Inguinal hernias are the most common type, and they appear as a bulge in the groin area, roughly where your lower abdomen meets your upper thigh. In men, the bulge often extends downward and can protrude into the scrotum, making one side look noticeably larger or swollen. In women, the bulge tends to be smaller and may push into the outer lips of the vulva, though this is less common.
Some inguinal hernias are large enough to see clearly through clothing. Others are so subtle that there’s no visible bulge at all. These “occult” hernias may only cause groin or pelvic pain without any lump you can see or feel, which is why they sometimes go undiagnosed for months.
Umbilical Hernia: Swelling at the Belly Button
An umbilical hernia creates a soft swelling or outward protrusion right at or next to the navel. In adults, it looks like the belly button is pushing outward or has developed a rounded lump beside it. The bulge is usually soft to the touch and can be gently pressed back in.
In babies, umbilical hernias are especially common and may only become visible when the infant cries, coughs, or strains. The belly button pokes outward during the effort and flattens back down when the baby relaxes. Most infant umbilical hernias close on their own by age 3 or 4. In adults, they tend to persist and gradually enlarge over time.
Incisional Hernia: Bulge Near a Surgical Scar
If you’ve had abdominal surgery, a hernia can develop along the scar line where the muscle wall was cut and didn’t fully heal. It appears as a bulge or lump near the scar, sometimes directly beneath it. The bulge becomes more noticeable when you stand up or tighten your abdominal muscles, and it may partly disappear when you lie flat.
Incisional hernias can develop weeks, months, or even years after surgery. They tend to grow slowly, so early on you might notice only a slight fullness along the scar that wasn’t there before.
Femoral Hernia: Lump in the Upper Thigh
A femoral hernia shows up as a small lump in the inner upper thigh, just below the crease of the groin. It’s easy to confuse with an inguinal hernia because the two are so close together, but the femoral hernia sits slightly lower. These hernias are uncommon overall and occur more frequently in women. They tend to be smaller than inguinal hernias and can be harder to spot visually, sometimes presenting only as a vague lump or tenderness in the area.
Hernias You Can’t See From the Outside
Not all hernias produce a visible bulge. A hiatal hernia, for example, happens when part of the stomach pushes upward through the diaphragm into the chest cavity. There’s nothing to see on the surface of your body. Most hiatal hernias are discovered accidentally on chest X-rays or CT scans done for unrelated reasons. The main symptoms are heartburn, acid reflux, and difficulty swallowing rather than any visible lump.
Other internal hernias, like obturator hernias deep in the pelvis, also produce no external bulge in most cases. These are rare and usually diagnosed only when they cause symptoms like abdominal pain or bowel obstruction.
How the Bulge Changes With Activity
One of the most distinctive features of a hernia is that it doesn’t stay the same size throughout the day. Activities that increase pressure inside your abdomen, like lifting something heavy, coughing, straining during a bowel movement, or even just standing for a long time, push more tissue through the weak spot and make the bulge larger and more visible. Lying down and relaxing typically allows the tissue to slide back through the opening, reducing or completely flattening the bulge.
This “now you see it, now you don’t” quality is a strong clue that what you’re looking at is a hernia rather than a cyst, lipoma, or swollen lymph node, all of which tend to stay roughly the same size regardless of position. If you’re trying to show your doctor, standing up and bearing down gently will often make the hernia most visible.
When a Hernia’s Appearance Signals Danger
A hernia that suddenly becomes firm, tender, and won’t flatten when you lie down has likely become incarcerated, meaning the tissue is trapped and can’t slide back through the opening. This is a significant change from the usual soft, reducible bulge.
The most urgent warning sign is a color change in the skin over the hernia. The area may first turn paler than the surrounding skin, then progress to red, purple, or noticeably darker. This color shift suggests the trapped tissue has lost its blood supply, a condition called strangulation. Severe pain, nausea, vomiting, and fever often accompany these changes. Strangulation is a surgical emergency because the tissue can die within hours.
A hernia that has always been painless and easy to push back in, and then suddenly becomes hard, painful, and discolored, needs immediate medical attention. The visual change from soft and skin-colored to firm and darkened is the clearest external signal that something has gone wrong.