Leg numbness may be caused by lumbar disc herniation, but not necessarily, it may also be caused by bad posture, lumbar spinal stenosis, lower extremity vascular lesions. 1. Bad posture: If you maintain a bad posture for a long time, so that the leg is compressed, the local blood circulation is not good, it is easy to form the feeling of numbness in the legs, usually after the activities can reduce the symptoms. 2. Lumbar disc herniation: leg numbness may be lumbar disc herniation, if the patient’s lumbar disc compression to the surrounding nerves, it is easy to cause pain and numbness in the lower limbs. 3. Lumbar spinal stenosis: lumbar spinal stenosis induced by various reasons can easily compress the spinal nerves in the lumbar spinal canal, and numbness as well as dyskinesia of the lower limbs will occur. 4. Lower extremity vascular lesions: if the patient has lower extremity varicose veins, lower extremity arteriosclerosis occlusive disease, etc., due to the obstruction of lower extremity circulation, may also induce numbness of the legs. Causes of numbness of the legs are more reasons, not necessarily lumbar disc herniation, if the symptoms do not improve after rest, it is recommended to go to the hospital in time to identify the cause of the disease, targeted treatment.