Consider physiological factors and pathological factors, such as calcium deficiency, lumbar spinal stenosis, venous thrombosis of the lower extremities, arthritis and other causes. 1. Physiological factors: for example, in a cold and wet environment, poor posture, standing for a long time will appear two leg pain, through warmth, rest can be better. 2. Calcium deficiency: Older people or postmenopausal women are prone to calcium deficiency and leg pain, which can be relieved by calcium supplementation. 3. Lumbar spinal stenosis: herniated intervertebral disc or osteophyte secondary to spinal stenosis can compress the nerve and spinal cord, resulting in leg pain and limping. 4. Lower extremity venous thrombosis: after the formation of blood clots in the lower extremities, the blood circulation is not smooth, and leg pain and swelling will occur. 5. Arthritis: joint degeneration or secondary synovitis can occur joint activity is limited, leg soreness. Two leg soreness to orthopedic examination to clarify the cause of further treatment.