Causes of Pain in the Leg After a C-Section

For the safety and well-being of both the mother and the baby, the American College of Obstetricians and Gynecologists recommends vaginal delivery unless there is medical reason for a cesarean section. Nonetheless, C-sections account 32 percent percent of all deliveries in the United States, according to 2014 data from the Centers for Disease Control and Prevention 2. Although relatively common, a C-section is major surgery and is associated with certain side effects and risks for both the baby and the mother. Some of these effects can manifest as leg pain in the mother, which can occur for different reasons.

Is This an Emergency?

If you are experiencing serious medical symptoms, seek emergency treatment immediately.

Deep Vein Thrombosis

Deep vein thrombosis, or DVT, refers to the development of a blood clot in a deep vein of the body. These clots most commonly form in the legs. DVT risk is increased during pregnancy and for approximately 6 to 8 weeks after delivery, the postpartum period. DVT risk during the postpartum period is significantly higher for women undergoing a C-section than for those who deliver vaginally. Symptoms of a DVT in the leg include warmth, redness, pain and swelling in one of the legs. Symptoms may involve the calf, back of the knee, thigh or the entire leg, depending on the location of the clot. A low fever can also occur.

Although fewer than 1 out of every 100 women develop a postpartum DVT, this condition is potentially life-threatening. The most significant danger of a DVT involves part of the clot breaking loose and traveling to the lungs. This condition, known as a pulmonary embolism, can cause a critical and possibly life-threatening blockage of blood flow through the lungs.

Muscle Fatigue and Fluids

If your C-section wasn't planned but rather decided on after a trial of labor, you might experience some muscle soreness in your legs after delivery related to labor positions. For example, squatting, kneeling, crouching or holding your knees to your chest for extended periods of time can make your legs sore.

Another possibility is an accumulation of fluid in your legs due to intravenous fluids given before and during your C-section. This can make your legs feel heavy and uncomfortable, but typically goes away within a few days.

Nerve Injury

Women undergoing a C-section are positioned lying flat on an operating table but the lower body is often tilted to reduce pressure on the blood vessels that supply the placenta to ensure adequate oxygen delivery to the fetus. Prolonged positioning for a C-section sometimes compresses nerves that can result in leg pain, numbness or tingling after the procedure. This type of nerve injury is rare and generally resolves over several days to weeks.

Regional anesthesia, which is used for the majority of C-sections in the U.S., allows mothers to remain awake and alert during the procedure. Rarely, temporary nerve irritation or injury can occur with this type of anesthesia, which might cause leg pain after a C-section. In most cases, the pain resolves within a few days.

Compartment Syndrome

Compartment syndrome is another rare complication that can occur after a C-section 7. With this condition, swelling in the leg after the procedure reduces blood supply to the muscles. This leads to pain, weakness and eventually numbness. Extensive blood loss during labor and delivery, low blood pressure, and use of medication to induce or speed the progression of labor increase the risk for compartment syndrome. Emergency surgery may be needed to relieve the pressure and reestablish adequate blood flow to the affected leg.

Warnings and Precautions

Contact your pregnancy healthcare provider right away if you experience new or worsening leg pain once you've returned home after a C-section, especially if your symptoms suggest the possibility of a DVT. Seek emergency medical care if you experience signs or symptoms of a pulmonary embolism, including: -- shortness of breath or rapid breathing -- chest pain -- cough -- dizziness, lightheadedness or fainting -- a rapid or pounding heartbeat

Reviewed and revised by: Tina M. St. John, M.D.