Femoral hernias are more commonly seen in women. The hernia sac enters the femoral canal and terminates beside the femoral vessels, so the small mass is usually located on the medial side of the thigh, below the inguinal ligament, or near the pubic symphysis. When enlarged, the hernia sac moves upward and can sometimes be difficult to distinguish from an indirect inguinal hernia. There is no impulse sensation during coughing, and femoral hernias often cause symptoms of strangulation.
On ultrasound, the hernia sac in a femoral hernia shows hyperechoic areas, located below the inguinal ligament, beside the femoral artery and vein on the medial side of the thigh, or near the pubic symphysis. In larger hernia sacs, the hyperechoic areas may move upward, distinguishing them from inguinal hernias. In long-standing cases, anechoic areas indicating fluid accumulation can be observed in the hernia sac.