The core symptom: a bulge that changes with position and effort
The most common symptom of a hernia is a soft bulge or lump in the abdomen or the groin, the area between the lower abdomen and the top of the thigh. Its typical feature is that it changes: it becomes more obvious when you stand, cough, sneeze or strain on the toilet, and it shrinks or disappears when you lie on your back. [2, 3, 4]
This happens because a piece of fat or bowel pushes through a weak spot in the abdominal wall when pressure inside the abdomen rises, and slides back when the pressure falls. That is why a hernia can look smaller in the morning and bigger at the end of the day, after long periods of standing or physical work. [3, 4]
Many people notice the bulge by chance while showering or dressing, with no pain at all. That is common: many hernias start painless and can stay that way for a long time. No pain does not mean there is no hernia, and pain does not by itself mean the hernia is dangerous. [2, 5]
What matters more than how the bulge looks is how it behaves. Does it go back on its own? Is it getting bigger over the months? Has it become firm, or painful in a new way? These questions separate a hernia that can wait for a routine examination from one that needs quicker action. [2, 4]
Symptoms differ with the site of the hernia
An inguinal hernia is the most common type. It shows as a bulge in the groin crease, above the ligament that runs between the abdomen and the thigh. In men it can extend into the scrotum, causing swelling or heaviness there, and it is sometimes felt as a dragging ache that spreads towards the testicle. [1, 5, 9]
A femoral hernia appears slightly lower, at the top of the thigh just below the groin crease, and it is often small and hard to see. It matters because it is more likely to become trapped than an inguinal hernia, so any new bulge in that area deserves an examination without a long delay. [2, 6]
An umbilical hernia appears around or inside the belly button. An epigastric hernia appears in the midline between the belly button and the breastbone; it is often small and can hurt with effort more than its size would suggest. An incisional hernia appears at the scar of a previous operation and can develop months or years after surgery. [2, 8, 10]
A rarer type, the Spigelian hernia, appears on the side of the abdomen below the level of the belly button. It can lie hidden beneath the muscle layers, causing pain at a specific spot without an obvious bulge, and diagnosing it may require a scan. [10]
What the pain is like and how people describe it
Hernia pain is usually not sharp. People describe it as heaviness, a dragging sensation, burning or pressure at the site of the bulge. It often gets worse towards the end of the day, after lifting something heavy or after standing or walking for a long time, and it eases when you lie down and rest. [5, 9]
Some people have groin pain without a visible bulge. In that case the examination looks for a small hernia that cannot be seen, and the HerniaSurge guidelines say ultrasound can help here, with MRI or CT used if ultrasound does not settle the question. [6]
Groin pain also has causes other than a hernia, such as muscle and tendon strain in athletes, hip joint problems or urinary causes. So pain without a bulge is not enough to call it a hernia, and the doctor needs to examine you and ask about the character of the pain. [6, 9]
The sensation that deserves more attention is pain that changes suddenly: it becomes severe and constant instead of mild and intermittent, or a bulge that used to go back becomes firm and stays out. That change is different from the usual heaviness and calls for a different response. [2, 5]
How symptoms differ between men and women
Inguinal hernias are far more common in men and usually show as a clear bulge in the groin that can extend into the scrotum. Any new swelling in the scrotum needs an examination, because not every swelling there is a hernia and other causes need a different assessment. [1, 5]
In women a hernia can be smaller and harder to feel, and the symptoms are sometimes groin or lower abdominal pain without an obvious bulge. The HerniaSurge guidelines point out that femoral hernias make up a larger share of groin hernias in women than in men, so the doctor looks for one specifically. [6]
Because of this, the guidelines advise that women with a groin hernia are offered repair rather than watchful waiting in most cases, since telling an inguinal from a femoral hernia on examination is not easy and a femoral hernia carries more risk. [6]
After pregnancy, a bulge in the middle of the abdomen may be a separation of the abdominal muscles rather than a hernia. The difference matters because each has a different plan, and an examination is what tells them apart. [7]
Things that look like a hernia but are not
Not every lump in the abdomen or groin is a hernia. Separation of the rectus abdominis muscles creates a long ridge down the middle of the abdomen that shows when you sit up from lying down or tense the abdominal muscles; the difference is that there is no hole in the wall and no bowel pushing through it. [7, 10]
There are also lipomas, fatty lumps under the skin that stay the same when you cough or stand. Enlarged lymph nodes in the groin tend to be small and mobile and can be tender when there is nearby inflammation. Bleeding into an abdominal muscle after strain or injury can also cause a painful lump. [10]
That is why asking whether the lump changes with coughing and standing is useful: a hernia usually grows with pressure and shrinks with rest, while most other lumps keep the same size. This is not a complete rule, though, because a trapped hernia also stays the same size. [3, 10]
If the bulge appeared after childbirth or after abdominal surgery, you can read about hernia after pregnancy or a C-section to understand the difference between muscle separation and an incisional hernia, and when each needs an examination. [7, 8]
Symptoms that change the priority
A hernia that goes back on its own and does not hurt can usually be examined at a routine appointment. Some symptoms, however, turn it into an urgent problem, because they can mean the hernia has become trapped or that blood is no longer reaching the piece of bowel inside it. [2, 4]
Those symptoms are sudden, severe pain at the hernia, a bulge that has become firm and painful and will not go back, redness or a change in the colour of the skin over it, vomiting, severe constipation with inability to pass wind, or fever with the pain. [2, 4, 5]
Any of these needs emergency care straight away, not a clinic appointment. Do not force the bulge back in if it is painful or firm. [2, 5]
The full list of warning signs, and when watchful waiting is reasonable versus when surgery is better, is in our article on abdominal hernia warning signs. This article focuses on everyday symptom patterns and how to make sense of them before an examination. [2, 6]
How an examination confirms the symptoms
In most cases the diagnosis is made by examination. The doctor looks at the abdomen and groin while you stand and lie down, asks you to cough or strain so the bulge shows, and feels the area to find the defect and see whether the hernia goes back. [1, 4, 9]
Scans are not always needed. Ultrasound is used when symptoms are present but the examination is unclear, such as pain without a bulge. CT is useful for incisional and larger abdominal-wall hernias because it shows the size of the defect and its contents before any repair is planned. [6, 8, 10]
The doctor also asks about things that affect the plan: a chronic cough, constipation, difficulty passing urine in men, smoking, weight, previous operations and blood-thinning medicines. These do not make the diagnosis, but they help decide the timing and the approach. [1, 8]
In the end the decision is shared: whether the hernia needs repair now or can be watched while you know the warning signs, and which type of operation suits you if repair is chosen. [6, 8]
Record your symptoms before the appointment
Before the examination, note exactly where the bulge is, when you first noticed it, whether it goes back when you lie down, what makes it bigger, and whether there is pain and when it gets worse. These notes save a lot of time and help the doctor match the symptoms to the type of hernia. [2, 4]
If the bulge appears only when you stand and disappears in the clinic, a photograph taken when it shows can help, as long as it is shown to the doctor rather than used to diagnose yourself. Bring a list of previous operations, medicines and long-term conditions. [8, 10]
This article explains symptoms; it does not make a diagnosis. Diagnosis and decisions come after an examination, and every hernia has its own circumstances. If you have a bulge that has not been examined yet, or a known hernia that is changing, you can book an appointment with the surgeon for an examination and a clear plan. [1, 2]
If at any point signs of a trapped hernia appear, such as severe pain with a firm bulge that will not go back, or vomiting, go to the emergency department straight away rather than waiting for the appointment. [2, 5]
