What is a femoral hernia?
A femoral hernia is the protrusion of intra-abdominal contents — usually fat or a portion of small bowel — through the femoral canal, a narrow anatomical passage that lies below the inguinal ligament, at the top of the thigh.
It belongs to the family of groin hernias but is clearly less common than an inguinal hernia. Its critical difference is anatomical: the femoral ring is narrow and surrounded by rigid ligaments, so its contents become trapped easily and cannot be reduced — which makes a femoral hernia far more dangerous than other hernias.
How common is it and who does it affect?
Femoral hernias account for a small proportion of all groin hernias. They occur much more frequently in women than in men, owing to anatomical differences of the pelvis.
They are more common at older ages and in women who have been pregnant. An important clinical point: about 1 in 3 femoral hernias first presents as an emergency — with strangulation or bowel obstruction — rather than as a simple, painless bulge.
How does it present?
A femoral hernia typically appears as a small bulge at the top of the thigh, lower than an inguinal hernia. It is often small and hard to feel, particularly in overweight patients. The main features:
- A small bulge below and lateral to the pubic bone, at the root of the thigh.
- Often asymptomatic at first — it may not even be noticed.
- Discomfort or pain in the groin, especially on standing or exertion.
- Signs of strangulation (emergency): sudden severe pain, a hard, tender bulge that does not reduce, nausea, vomiting, abdominal bloating — requires immediate hospital attendance.
How is it diagnosed?
The diagnosis is primarily clinical, with careful examination of the groin by the surgeon. However, because a femoral hernia is often small and hard to distinguish from an inguinal hernia, imaging plays an important role:
- Clinical examination — locating the bulge below the inguinal ligament.
- Groin ultrasound — the first imaging test, helping to distinguish a femoral hernia from an inguinal hernia, an enlarged lymph node or other causes.
- CT scan — especially when the patient presents with bowel obstruction, to confirm a strangulated femoral hernia as the cause.
Which factors increase the risk?
A femoral hernia is associated with factors that raise intra-abdominal pressure or weaken the area of the femoral ring:
- Female sex — the most important factor.
- Pregnancy, especially multiple pregnancies.
- Older age.
- Chronic increases in intra-abdominal pressure (chronic cough, constipation, heavy lifting).
- Rapid weight loss.
- Previous inguinal hernia repair in the same area.
Modern treatment options
A femoral hernia is always treated surgically. The choice of technique depends on whether surgery is planned or emergency, on the anatomy and on any coexisting conditions.
Minimally invasive repair (TEP / TAPP)
The modern method of choice for planned repair: through small incisions, mesh is placed in the posterior plane, safely covering the femoral ring. It allows inspection of the whole groin, little post-operative pain and rapid recovery.
Open mesh repair
Through a small incision in the groin or thigh, with mesh placement to close the femoral ring. Used in selected cases or when there are contraindications to laparoscopy.
Emergency surgery for strangulation
When a femoral hernia has strangulated, surgery is urgent. The hernia is reduced, bowel viability is checked and, if needed, the affected segment is removed. Timely presentation is the most important factor for a good outcome.
Common patient questions
Does a femoral hernia definitely need surgery?
Yes. Unlike an inguinal hernia, where watchful waiting may be chosen in asymptomatic patients, every femoral hernia is recommended for repair as soon as it is diagnosed — even if it is not bothersome — because of the high risk of strangulation.
Why is it more dangerous than an inguinal hernia?
Because of anatomy: the femoral ring is narrow and surrounded by rigid ligaments. So its contents become trapped easily and can strangulate, threatening bowel viability. The risk of strangulation is clearly higher than with an inguinal hernia.
How is a femoral hernia distinguished from an inguinal hernia?
A femoral hernia appears lower, below the inguinal ligament, whereas an inguinal hernia is above it. In practice the distinction is not always easy on clinical examination, so an ultrasound often helps.
Is the operation major?
Planned repair is usually done laparoscopically or robotically, with small incisions, a short hospital stay and quick recovery. Emergency surgery for strangulation is more complex — which is exactly why timely, planned repair is preferred.
What should I watch for until surgery?
If you have been diagnosed with a femoral hernia and develop sudden severe pain, a hard bulge that does not go back, nausea or vomiting, go to an emergency department immediately — these are possible signs of strangulation requiring urgent treatment.