Neck, shoulder, back and leg pain may be caused by the cross influence of many diseases, which may be caused by cervical spondylosis, frozen shoulder, lumbar intervertebral disc herniation, rheumatic polymyalgia and other factors. 1. Cervical spondylosis: Cervical spondylosis mainly causes neck pain, which may occur when nerve roots are involved. 2. Frozen shoulder: If the patient has degenerative soft tissue lesions in the shoulder or long-term shoulder strain, he/she may suffer from frozen shoulder, which mainly causes shoulder pain. 3. Lumbar disc herniation: if the patient’s intervertebral disc aging, degenerative changes or disc injury may lead to lumbar disc herniation, mainly causing lumbar pain. 4. Rheumatism: patients with rheumatism may have symptoms of leg pain due to insufficient function of the joints and the surrounding nerves and blood vessels, and slow vasoconstriction and diastole. 5. Rheumatic polymyalgia: Patients with rheumatic polymyalgia may experience pain in the joints and muscles, commonly in the shoulder joints, neck and pelvic girdle muscles. Neck, shoulder and lumbar pain may also be caused by other factors, the patient should go to the hospital for timely examination, after the cause of the disease is clearly defined should be timely consultation.