Hidden pain in the left posterior lumbar region may be related to lumbar disc herniation, lumbar strain, and some urologic disorders. Lumbar disc herniation, lumbar spinal stenosis and other compression of spinal cord nerve roots, in the early stage of the lesion will appear in the left posterior lumbar hidden pain symptoms. With the aggravation of the lesion the pain gradually worsens, accompanied by numbness, and also radiates to the lower limbs. Lumbar fasciitis, lumbar muscle strain will form a local aseptic inflammation, inflammation stimulation will also cause the symptoms of left posterior lumbar pain. Part of the urinary system diseases, such as left hydronephrosis, can also be caused by radiating pain in the left posterior lumbar region. Long time labor lumbar muscle fatigue will also appear in the rest of the symptoms of hidden pain. If you have symptoms of left posterior lumbar pain, it is recommended that you go to the hospital in time to receive regular treatment to identify the cause of the disease.