The leg numbness after childbirth may be caused by the following reasons: 1, may be caused by poor blood circulation in the lower extremities, in the process of birth, because the lower extremities may be squeezed, twisted, cold for a long time, this environment will lead to the blood circulation of the lower extremities slowed down, in the long run will lead to poor blood circulation in the lower extremities, and then produce the symptoms of cold, numb, purple lower extremities. 2, may be complicated by Peripheral nerve lesions, such as in the process of production, due to the physiological curvature of the lumbar spine has changed dramatically, then it is possible to induce the onset of lumbar disc herniation this kind of disease. This is the first time that a person has been in a situation where the nerve roots have been stimulated, causing radioactive pain, numbness and weakness in the lower extremities. 3, this symptom may also be caused by excessive blood loss, in the process of giving birth, if there is a lot of bleeding, it may cause a lack of effective circulation of blood in the body, that is, shock, which will also be manifested as the situation of numbness in the extremities. In addition, if severe anemia is produced, it is also possible to produce numbness in the lower limbs.