The most common cause of low back pain in young people is prolonged sedentary lifestyle, prolonged bending and weight-bearing, which may lead to local muscle fatigue or ligament damage, causing pain in the lower back. Pain in the legs is most likely due to local muscle strain or ligament injury caused by long-distance walking, prolonged standing, sports and labor, resulting in leg pain. If the pain occurs regularly, it cannot be ruled out that it is due to lumbar disc herniation or lumbar spinal stenosis that compresses the local nerve roots, resulting in low back pain. After this situation, you should go to the hospital in time to choose the lumbar spine CT or MRI related examination to clarify the specific cause of which is caused, and then choose the appropriate treatment measures to treat, in order to relieve the symptoms.