Lumbar pain is considered to be caused by lumbar muscle strain, lumbar dorsal fasciitis, lumbar spine lesions, osteoporosis and urinary stones and other diseases, need to consult a doctor in time to identify the cause. 1. Lumbar muscle strain: can be caused by fatigue, exertion and other factors, the accumulation of lactic acid and other metabolic products in the muscle, inflammatory factors stimulate the nerves, can cause muscle tension, soreness, pain, lumbar spine activity is limited performance. 2. Lumbar back fasciitis: it can be caused by congestion and edema of the fascia of the lumbar back due to cold and strain, which will lead to lumbar back pain. 3. Lumbar spine diseases: common lumbar spine diseases include lumbar disc herniation, lumbar degeneration, etc. Due to spinal changes, the soft tissues on both sides of the lumbar vertebrae are persistently strained. Herniated discs can compress and irritate the nerves, which can also cause radiating pain in the muscles on both sides. 4. Osteoporosis: Because osteoporosis can cause pain in all joints and parts of the body, lumbar back will also have different degrees of pain and soreness. 5. Urinary stones: Ureteral and kidney stones can irritate the ureter and cause pain in the lower back, which can also be a dull ache. There are many diseases that cause low back pain, such as lumbar spine tumor, ankylosing spondylitis and gout, etc. You should undergo lumbar CT or MRI examination in time to clarify the cause of the disease and then carry out appropriate treatment.