For example, in patients with herniated discs or lumbar transverse synovial syndrome, the lumbar spinal nerve, which is the source of the sciatic nerve in the human leg, is usually slightly squeezed and stimulated. Once the lumbar area is rested and relaxed, the symptoms will be relieved. This condition usually occurs because the primary disease is relatively mild. It may also be caused by local soft tissue lesions in the legs, such as chronic fasciitis, where the legs often feel tense and stiff, and once cold weather or overexertion is encountered, localized pins and needles-like pain will occur, and the symptoms will be significantly relieved by reducing the activities of the legs. Once the occasional pins and needles pain occurs in the leg, it is best to promptly consult an orthopedic surgeon for a diagnosis.