The most reliable way to check for an inguinal hernia is to stand in front of a mirror, look for a bulge in the groin or scrotum, and feel for one while coughing. A hernia bulge typically appears in the crease where the lower abdomen meets the thigh, and it may extend down into the scrotum. While a self-check can reveal an obvious hernia, a physical exam by a doctor catches about 75% of inguinal hernias, meaning some require imaging to confirm.
What You’re Looking and Feeling For
An inguinal hernia creates a visible or palpable bulge when tissue pushes through a weak spot in the abdominal wall near the groin. The bulge shows up in one of two places: along the inguinal canal (the crease where your abdomen meets your thigh) or lower, in the scrotum itself. It often looks like a soft lump that wasn’t there before.
The bulge tends to become more noticeable when you stand up, strain, cough, or lift something heavy. It may shrink or disappear entirely when you lie down, because gravity helps the protruding tissue slide back into the abdomen. If a bulge stays visible regardless of position and you can’t gently press it back in, that’s a sign the hernia may be trapped (incarcerated), which needs prompt medical attention.
Not all hernias produce a visible lump. Some cause only a vague aching, burning, or dragging heaviness in the groin, especially after standing for long periods or physical exertion. You might also feel pressure or discomfort that worsens throughout the day and eases when you lie down at night.
How to Do a Self-Check at Home
Stand upright in front of a mirror in a well-lit room. Angled or side lighting can help reveal subtle bulges that overhead light misses. Look at both sides of your groin for any asymmetry, swelling, or new lumps. Relax your abdominal muscles first and simply observe, then cough forcefully a few times while watching for any bulge that pops out during the cough and recedes afterward.
Next, use your fingers. Place your fingertips over the inguinal area on each side, right along that crease between your abdomen and thigh. Apply gentle pressure and cough again. You’re feeling for a soft mass that pushes outward against your fingers during the cough. Check one side at a time so you can compare the two. If you feel something bulge into your fingertips on one side but not the other, that’s worth getting evaluated.
Now lie down on your back with your knees slightly bent. If you noticed a bulge while standing, see if it flattens or disappears in this position. You can try gently pressing on it with a flat hand to see if it slides back in. A hernia that reduces (goes back in) when you lie down and reappears when you stand is a classic presentation. One that stays out and feels firm or tender may be incarcerated.
What a Doctor Does Differently
During a clinical exam, the doctor will ask you to stand while they sit at eye level with your groin. They’ll visually inspect both sides, then ask you to cough or bear down while they watch for movement or bulging in the inguinal area.
The key part of the exam involves a technique you can’t replicate on your own. The doctor inverts the scrotal skin with a finger and follows the inguinal canal upward toward the internal inguinal ring, a natural opening in the abdominal wall. While their finger is positioned in the canal, they’ll ask you to cough. A hernia pushing against the side of the finger suggests a direct hernia (the more common type in older men), while one felt at the fingertip coming from deeper in the canal suggests an indirect hernia. This distinction matters for surgical planning but doesn’t change the urgency of treatment.
Physical examination has a sensitivity of about 75% and a specificity of 96%. That high specificity means if a doctor feels a hernia, it almost certainly is one. But the 75% sensitivity means roughly one in four hernias gets missed on exam alone, particularly smaller ones or hernias in patients with more body fat around the groin.
When Imaging Is Needed
If you have groin pain that suggests a hernia but no bulge can be found on physical exam, you may have what’s called an occult hernia. These are symptomatic but not detectable by touch. Ultrasound is often ordered first because it’s quick and widely available, with a sensitivity above 90% for groin hernias. However, ultrasound and CT scans cannot reliably rule out all occult groin hernias.
MRI is the most accurate imaging option, with both sensitivity and specificity above 95%. It’s particularly useful for distinguishing an inguinal hernia from a femoral hernia (which occurs slightly lower, near the upper thigh) since the two require different surgical approaches. Your doctor will decide which imaging study makes sense based on your symptoms and exam findings.
Conditions That Mimic a Hernia
Several other conditions can cause a lump or swelling in the groin or scrotum that looks or feels like a hernia. Knowing the differences can help you describe your symptoms more accurately to a doctor.
- Hydrocele: A fluid collection around the testicle that causes painless scrotal swelling. The classic test is transillumination: shining a light against the scrotum. A hydrocele glows because it’s filled with clear fluid, while a hernia blocks the light because it contains solid tissue or bowel.
- Varicocele: Enlarged veins in the scrotum, often described as feeling like a “bag of worms.” Varicoceles typically appear on the left side, feel soft and compressible, and become more prominent when standing.
- Enlarged lymph node: Firm, round, and usually not reducible (doesn’t push back in). Lymph nodes sit slightly lower than where a hernia bulge appears and don’t change size with coughing.
- Lipoma: A soft, fatty lump that stays the same size regardless of position or straining. It doesn’t reduce when you lie down.
If you’re unsure whether a lump is a hernia or something else, an ultrasound with color Doppler can differentiate between these conditions by showing blood flow patterns and identifying whether the mass is fluid-filled, solid, or contains bowel.
Warning Signs of a Strangulated Hernia
Most inguinal hernias are not emergencies, but a strangulated hernia is. Strangulation happens when the blood supply to the trapped tissue gets cut off, and it can lead to tissue death within hours. The warning signs are distinct and escalate quickly:
- Sudden, severe groin or abdominal pain that keeps getting worse rather than coming and going
- A bulge that turns hard, tender, and won’t push back in
- Skin color changes over the bulge, starting paler than usual and then turning red or dark
- Nausea and vomiting, especially combined with the inability to pass gas or have a bowel movement
A strangulated hernia requires emergency surgery. If you notice these symptoms together, go to the emergency room. The combination of a non-reducible bulge with escalating pain and skin color changes is the clearest signal that the hernia has progressed beyond a routine problem.
What Increases Your Risk
Inguinal hernias are far more common in men than women because of how the inguinal canal develops. In males, the canal serves as the pathway the testicles descend through before birth, leaving a natural weak point in the abdominal wall. Factors that increase pressure on that weak spot raise your risk: chronic coughing, heavy lifting, straining during bowel movements, obesity, and a family history of hernias. Prior hernia repair on one side also increases the chance of developing one on the other side.
If you’ve identified a painless, reducible bulge in your groin that appears with straining and disappears when you lie down, you likely have an inguinal hernia. Not all hernias need immediate surgery, but they don’t resolve on their own and tend to enlarge over time. Getting a clinical exam confirms the diagnosis and helps determine whether watchful waiting or surgical repair is the better path for your situation.