Noticed an odd lump near your groin or belly button? It's a common moment of confusion — is it dangerous, or nothing to worry about? More often than not, a lump like this turns out to be a hernia: extremely common, well understood, and very treatable.
A quick self-check
- Lie down — does the lump shrink or disappear?
- Press gently — is it tender or painful to the touch?
If the lump changes with position and causes some discomfort, a hernia is a likely explanation — though a proper examination is always the way to confirm it.
What is a hernia, exactly?
A hernia occurs when an internal organ or tissue pushes through a weakened area of the abdominal wall — the muscular layer that normally keeps everything in place. Rather than falling out of the body entirely, the bulge stays contained beneath the skin, which is thick enough to hold it in.
Hernias can be present from birth or develop later in life. In children, inguinal hernias occur in roughly 3% of cases, with boys six to ten times more likely to be affected than girls — most often appearing in infants under one year old. Among children with this type of hernia, around 30% experience a complication where bowel becomes trapped within the hernia sac, underlining why early assessment matters.
In adults, men face a considerably higher lifetime risk of inguinal hernia than women — roughly 27% compared to 3%. The most common underlying driver is simply the gradual wear and tear of muscle tissue that comes with age, though several other factors contribute too, which we'll cover below.
Types of hernia
Hernias are named according to where they occur on the body:
Inguinal Most Common
Located in the lower groin, around the inguinal canal — a passage present in both sexes. In men, it carries the spermatic cord and blood vessels to the testicles; in women, it supports the womb via the round ligament. This is by far the most frequently seen hernia type.
Umbilical
Occurs near the belly button. More common in children, as well as in women who are obese or have had multiple pregnancies.
Incisional
Develops at the site of a previous surgical incision in the abdomen, where the repaired tissue is inherently weaker.
Epigastric
Located in the upper abdomen, between the lower breastbone and the belly button.
Femoral
Found at the top of the inner thigh. Less common overall, and seen mainly in older women.
What causes a hernia?
Wear and tear of muscle tissue
Our bodies naturally weaken over time, and repeated strain — particularly from physically demanding work or improper weightlifting technique — thins the abdominal wall in specific areas, eventually creating a weak point an organ can push through.
Unhealthy lifestyle factors
Poor nutrition affects muscle integrity, and both being underweight (insufficient muscle endurance) and obesity (excess strain on supporting tissue) raise hernia risk. Smoking is also associated with weaker tissue health overall.
Pregnancy
As the womb expands during pregnancy, it places sustained pressure on the abdominal wall — much like a balloon stretching from the inside. This can thin the surrounding muscle and contribute to umbilical hernia, sometimes visible as bulging around the belly button.
Chronic constipation and coughing
Repeated straining during bowel movements puts ongoing pressure on the abdominal muscles. Chronic coughing — sometimes related to smoking — can have a similar, though rarer, effect.
What symptoms should you look for?
- A visible bulge or lump, often around the groin or belly button
- Pain or tenderness at the site of the bulge
- A sense of pressure or heaviness in the affected area
- Worsening of the bulge after standing or walking for extended periods
- Improvement or disappearance of the bulge when lying flat
- Discomfort when lifting objects, even if no visible lump is present
Many hernias are "reducible" — meaning the bulge can be gently pushed back in. It's worth monitoring the size over time: a hernia that's steadily growing larger is a sign it's progressing and worth addressing sooner rather than later.
How is a hernia diagnosed?
A visit to your doctor typically starts with a physical examination — pressing on the lump, and sometimes asking you to cough to see how the bulge responds. From there, one of two paths usually follows:
- If there's no pain or discomfort, your doctor may simply monitor the hernia over time, since it's not causing problems
- If there's tenderness or pain, further investigation is usually warranted
Imaging such as ultrasound, CT scan, MRI, or X-ray may be used to get a clearer picture of exactly what's involved and to rule out complications before deciding on the right treatment approach.
The key message: Hernias do not resolve on their own, and they tend to enlarge gradually over time. The earlier a hernia is assessed and treated, the simpler the repair — and the lower the risk of complications such as the hernia becoming trapped or strangulated, which requires emergency surgery.
Dr Cha Kar Huei
Consultant General Surgeon (Gastrointestinal, Bariatric & Robotic Surgery), Hospital Picaso