A femoral hernia occurs when a small portion of tissue, usually part of the small intestine, pushes through a weak spot in the muscle wall of the upper thigh, just below the groin crease. Unlike the more common inguinal hernia, which bulges above the groin crease, a femoral hernia appears below it. These hernias are relatively uncommon overall but carry an unusually high risk of becoming trapped and losing blood supply, which is why surgeons almost always recommend repair rather than watching and waiting.
Where Femoral Hernias Form
Your upper thigh contains a small passageway called the femoral canal, which sits right next to the large vein that carries blood from your leg back to your heart. This canal is the smallest compartment in a sheath of tissue that also houses the femoral artery, vein, and nerve. At the top of this canal is an opening called the femoral ring, and that ring is the weak point where tissue can squeeze through.
The femoral ring is bordered on all sides by tough, rigid structures: ligaments, bone, and dense connective tissue. Those borders don’t stretch easily. That rigidity is exactly what makes femoral hernias dangerous. Once tissue pushes through, the firm edges of the ring can clamp down on it like a tight collar, cutting off blood flow to whatever has slipped through.
Who Gets Femoral Hernias
Femoral hernias are more common in women than in men, likely because the female pelvis is wider, leaving a slightly larger femoral canal. That said, they can occur in anyone. Risk increases with age, repeated heavy lifting, chronic coughing, straining during bowel movements, and anything else that raises pressure inside the abdomen over time. Pregnancy and childbirth may also contribute by stretching the tissues around the femoral canal.
Symptoms and Warning Signs
Most femoral hernias produce no symptoms at all. When they do, the most common sign is a small bulge in the upper thigh near the groin. The bulge may be more noticeable when you stand up, cough, or strain, and it may flatten or disappear when you lie down.
Groin discomfort that worsens with standing, lifting, or straining is another common symptom, though many people feel nothing beyond a vague sense of pressure. The hernia itself is often small enough that it’s easy to overlook or mistake for a swollen lymph node.
The real concern is strangulation, which happens when the hernia becomes trapped and its blood supply gets cut off. Strangulation rates for femoral hernias are striking: studies report that between 44% and 86% of femoral hernias end up incarcerated or strangulated. That’s dramatically higher than inguinal hernias, where the risk is much lower. Signs of strangulation include extreme tenderness and redness at the bulge, sudden pain that escalates quickly, nausea, vomiting, and abdominal pain. This is a surgical emergency.
How Femoral Hernias Differ From Inguinal Hernias
Because both types occur in the groin area, telling them apart can be tricky, even for experienced clinicians. The key anatomical landmark is the inguinal ligament, a band of tissue that runs from the front of the hip bone to the pubic bone. An inguinal hernia bulges above and toward the midline of this ligament. A femoral hernia bulges below and slightly to the outside of it, closer to the crease where the thigh meets the body.
Inguinal hernias are far more common, accounting for the vast majority of groin hernias, and they occur most often in men. Femoral hernias are rarer overall but disproportionately affect women. The practical importance of distinguishing them goes beyond anatomy: femoral hernias are much more likely to become strangulated, so the treatment approach is more urgent.
Diagnosis
A physical exam is often the first step, but femoral hernias are notoriously difficult to detect by touch alone, especially in patients who are overweight or whose hernia is small. When the clinical picture is unclear, ultrasound is a reliable next step. In one study comparing ultrasound to surgical findings, ultrasound correctly identified the type and presence of hernia in 91% of cases, with a sensitivity of 95%. CT scanning is sometimes used as well, particularly when strangulation is suspected or the anatomy is ambiguous. CT can show the exact position of the hernia sac relative to the pubic bone and femoral vein, helping surgeons plan the repair.
Why Surgery Is Recommended
For inguinal hernias that cause no symptoms, a “watchful waiting” approach is sometimes reasonable. Femoral hernias are a different story. Because their strangulation rate is so high, the standard approach is to repair them promptly, even when they aren’t causing pain. Waiting increases the chance that tissue will become trapped in the rigid femoral ring, which turns a straightforward planned surgery into an emergency operation with higher complication rates.
Surgical Repair Options
Femoral hernias can be repaired through either open surgery or laparoscopic (keyhole) surgery. In open repair, the surgeon makes an incision near the groin, pushes the herniated tissue back into place, and reinforces the weak area. This reinforcement typically involves a piece of synthetic mesh shaped to cover the femoral ring and surrounding tissue, preventing future herniation. One well-studied technique uses a three-dimensional mesh plug fashioned to fill and support the canal. In a study of 75 patients treated with this approach, no recurrences were detected during follow-up, and complications were limited to a few cases of minor wound swelling and two wound infections, all resolved within weeks.
Laparoscopic repair uses several small incisions and a camera to guide the surgery from inside the abdomen. A nationwide Danish analysis found that laparoscopic repair reduced the risk of needing a second operation for recurrence by about two-thirds compared to open repair. Laparoscopic surgery also tends to cause less post-operative pain and may allow a slightly faster recovery, though both approaches are effective.
Recovery After Surgery
Most people go home the same day as surgery or the following day. Gentle walking is encouraged early on because it supports healing, but you should avoid heavy lifting and strenuous activity for about six weeks. Desk jobs and other sedentary work are usually manageable within two to three weeks. If your work involves manual labor, expect to need more time off. Some soreness and swelling around the incision site is normal in the first couple of weeks and gradually improves.
Complications from planned femoral hernia repair are uncommon. The most frequent issues are minor: small collections of fluid or blood near the wound that resolve on their own or with simple drainage. Chronic pain after surgery is rare with modern mesh techniques. Recurrence rates are low, particularly with laparoscopic repair, though any hernia repair carries a small chance of the hernia returning over time.