There are many reasons for leg numbness in young people, the most common are postural numbness, lumbar disc herniation, nerve injury, etc., as follows: a. Postural numbness: young people with leg numbness may be postural numbness, postural numbness refers to prolonged squatting or sedentary, resulting in impaired blood circulation in the bilateral lower extremities, nerve compression will lead to the patient’s leg numbness. By paying attention to rest, reduce the local stimulation, local active hot compress, massage, etc. will slowly recover. Second, lumbar disc herniation: if the patient has lumbar disc herniation, lumbar spondylolisthesis and other conditions. When the nerve roots of the spinal cord are compressed, it will also lead to leg numbness, which requires general X-ray, CT and MRI examination of the lumbar spine to make a clear diagnosis. Third, nerve injury: patients with nerve injury caused by external forces on the nerves of the legs, will also lead to leg numbness, the need to actively conduct electromyography examination, can be clearly diagnosed.