Numbness of legs after cesarean section may be caused by improper posture, venous thrombosis of lower limbs, lumbar disc herniation and other factors. 1. Improper posture: after cesarean section, due to the need for bed rest, improper posture during rest, causing pressure on the legs, and pressure for too long, it is easy to cause numbness of the legs, and can be relieved by itself after improving the bad posture. 2. Lower extremity venous thrombosis: after cesarean section, lying in bed for a long time may lead to the formation of lower extremity venous thrombosis, causing leg swelling and numbness. 3. Lumbar disc herniation: women themselves have lumbar disc herniation disease, improper care after cesarean section may make the lumbar disc herniation aggravate, which will cause numbness of the legs, and may be accompanied by lumbar pain, lower limb radiating pain and other symptoms. Numbness of the legs after cesarean section and other abnormal manifestations, it is recommended to seek medical examination and treatment to avoid adverse effects.