Standing for a long time lumbar pain, may be a normal physiological phenomenon, but also may be the lumbar spine osteoporosis, lumbar muscle strain or lumbar myofasciitis, lumbar intervertebral disc herniation and other factors lead to. 1. Normal physiological phenomenon: standing for too long may cause the accumulation of lactic acid metabolites in the lumbar muscles, causing local irritation, which will cause lumbar pain. 2. Lumbar osteoporosis: it may be related to the lack of calcium in the body, which can lead to increased brittleness of the lumbar joints, reduced loading capacity, standing for too long, it is easy to lumbar pain, and compression fracture can occur in severe cases. 3. Lumbar muscle strain or lumbar myofasciitis: prolonged exposure to cold or prolonged heavy physical labor in the lumbar region leads to damage to the muscles and fascia of the lumbar region, and standing for a long time may aggravate the damage, which will cause lumbar pain, and there may be a localized point of pressure and pain. 4. Lumbar intervertebral disc herniation: it may be related to acute injury, lumbar degenerative changes and other factors, prolonged standing, sedentary, excessive bending, may make the disc herniation aggravate, it will cause lumbar pain, there may also be radiating pain in the lower limbs, lower limb numbness and other symptoms. If lumbar pain lasts for a long time or is accompanied by other abnormal symptoms, it is recommended to seek medical examination and treatment to avoid delayed treatment.