The characteristic groin bulge

The most recognisable sign of a groin (inguinal) hernia is a lump you can see or feel in your groin. What makes it distinctive is how it behaves: the bulge appears when you stand, cough, strain, or exercise, and typically disappears or softens when you lie down or gently press it back.

This come-and-go pattern happens because the contents of the hernia — usually a small piece of bowel or fatty tissue from inside the abdomen — slide in and out through the gap as the pressure inside your abdomen changes. When you are upright and active, pressure rises and pushes tissue out through the gap. When you lie flat and relax, the contents slide back in.

Not all hernias produce a visible lump, especially in the early stages or in people with a larger abdominal wall. Sometimes a hernia can only be felt on examination, or shows up only as a vague ache with no obvious swelling. An ultrasound can confirm the diagnosis in those cases.

The ache and dragging sensation

Many people describe a dull ache or dragging heaviness in the groin — especially after standing for a long time, doing physical work, or at the end of a busy day. This happens because the tissue inside the hernia sac is pulling on the surrounding structures and the inner lining of the abdomen (the peritoneum) as it descends through the gap.

The discomfort is typically:

  • Worse after standing for a long time
  • Worse after lifting or straining
  • Better when you lie down and rest
  • Described as aching, heavy, or pulling — not usually a sharp pain at rest

For some people, this discomfort is significant enough to limit physical work, exercise, or even walking comfortably for extended periods.

Sharp pain with coughing or straining

A sudden, sharp pain in the groin when you cough, sneeze, lift, or strain is another very common symptom of a hernia. These activities create a rapid spike in abdominal pressure that forces the hernia contents through the gap abruptly. The pain is usually brief — just a second or two — but can be quite sharp and alarming when it happens.

If you find yourself tensing up or trying to avoid coughing because it hurts your groin, that is a meaningful symptom that deserves a proper assessment by a surgeon.

Scrotal swelling (indirect inguinal hernia)

In men, a groin hernia can sometimes travel further downward and descend into the scrotum. This is called an indirect inguinal hernia — it follows the same natural channel that the testicle descended through before birth (the inguinal canal), through which the spermatic cord also passes in adults.

When this happens, it produces a more noticeable swelling that can look like a testicular lump or a fluid collection (hydrocele). Key signs that point toward a hernia rather than these other causes:

  • The swelling extends up into the groin — with a hydrocele you can feel above it, but with a hernia you cannot
  • The swelling may shrink or disappear when you lie flat
  • You might feel a slight gurgling or bubbling sensation when pushing it back in (that is bowel returning to the abdomen)

Any new scrotal swelling should be assessed by a doctor. An ultrasound is very helpful in distinguishing a hernia from other causes of scrotal swelling.

Femoral hernia: a different pattern

Femoral hernias sit slightly lower than the typical groin hernia — they pass through a small passage called the femoral canal, just below the groin crease, toward the upper inner thigh. They are more common in women than men and tend to produce a small, firm lump rather than the obvious bulging lump of a groin hernia.

Femoral hernias can be subtle and easy to dismiss. The lump may be small and may not obviously reduce when you press on it. Because the passage they travel through is very narrow, femoral hernias carry a significantly higher risk of becoming trapped — and sometimes the first obvious symptom is sudden severe pain when the hernia strangulates, without much warning beforehand.

If you are a woman and you notice any lump in your upper inner thigh or lower groin, please get it checked promptly. Femoral hernias should be repaired regardless of whether they are causing symptoms.

What a groin hernia does not feel like

Not all groin pain or lumps come from a hernia. Other things that can cause similar symptoms include:

  • Muscle strain or inner thigh (adductor) tear — pain deep in the groin without a lump, usually related to sport or exercise
  • Athletic pubalgia (sometimes called a sports hernia) — a different condition involving tearing of the tendons around the pubic bone; there is no actual gap in the wall and no visible lump
  • Hip problems — hip osteoarthritis can cause pain that is felt in the groin
  • Enlarged lymph nodes — usually soft, multiple, and not affected by lying down or straining
  • Hydrocele or varicocele — swellings within the scrotum that do not extend up into the groin
  • A swollen lymph node in the groin — firm, not reducible, and does not change with position

The best way to work out whether your groin pain or lump is a hernia is a proper assessment by a surgeon — which includes a careful physical examination and, in many cases, an ultrasound.

Symptoms that come and go

It is very common for hernia symptoms to be intermittent — particularly in the early stages. The hernia may only bulge on some days, or the aching may only appear after heavy activity. This variability can lead people to put off getting it checked, thinking "it seems to be settling."

In reality, intermittent symptoms almost always progress over time. The gap in the wall gets bigger, the hernia becomes more prominent, and symptoms become more frequent and more persistent. Getting it assessed early means you can plan any surgery at a time that suits you — rather than needing emergency surgery after the hernia becomes trapped.

Signs of strangulation — when to seek emergency care

Signs of hernia strangulation — call 000 or go immediately to the emergency department:

• The hernia bulge becomes suddenly very painful, hard, and cannot be pushed back
• Constant, severe pain (unlike the usual intermittent ache)
• Nausea and vomiting
• The skin over the hernia becomes red or discoloured
• Fever

Strangulation means the blood supply to the trapped bowel is cut off. This is a surgical emergency requiring immediate operation. Do not wait to see your GP.

Frequently asked questions

I have groin pain but no visible lump — could it still be a hernia?

Yes, it could. Some hernias — particularly small or early ones — produce symptoms without any lump you can see. An ultrasound or an examination by an experienced surgeon can detect a hernia that is not yet large enough to be obvious. Groin pain that cannot be explained by muscle or hip problems is worth getting checked.

The lump goes away when I lie down — is that normal?

Yes, completely normal. A hernia that reduces (goes back in) when you lie flat is called a reducible hernia, and it is the most common pattern. It does not mean the hernia is harmless — it still carries risks over time and should be assessed. But it is not an emergency in the way a non-reducible hernia is.

Can a groin hernia cause testicular pain?

Yes. An inguinal hernia that extends into the scrotum can press on or irritate the spermatic cord (the cord that runs down to the testicle through the same groin channel), causing an ache in the testicle. If you have groin swelling and testicular discomfort together, have it assessed — it is a very recognisable pattern that a surgeon will want to examine.

Is it normal for a hernia to hurt more in the afternoon?

Very common — and a classic hernia pattern. Hernia discomfort tends to build up through the day as you are on your feet, and ease off after you lie down and rest overnight. If your groin feels fine in the morning but aches by afternoon, that pattern is very consistent with a hernia.

How is a groin hernia diagnosed?

Diagnosis is mainly by examination. Your surgeon will listen to your history and examine you both standing and lying down. You will probably be asked to cough — this raises the pressure inside your abdomen and makes the hernia push through, which your surgeon can feel. An ultrasound is used for cases where the hernia cannot be clearly felt, or when the diagnosis is uncertain.

When should I see a surgeon about groin pain or swelling?

Any new lump in the groin, or persistent groin pain that you cannot explain, is worth seeing your GP about and getting a referral to a surgeon. The sooner you know what it is, the more options you have. And if a lump in your groin suddenly becomes very painful and you cannot push it back in, go to the emergency department right away — do not wait.

Procedure Overview
Inguinal Hernia Repair

Learn more about this procedure — including what to expect, benefits, risks, and recovery.

Procedure details →

Concerned about a groin lump or ache?

Mr Ba Nguyen sees patients with groin hernias from across Melbourne's north-east. Ask your GP for a referral, or call (03) 9816 3951 to enquire. Consultations at 50 Mount Street, Heidelberg.