Men’s waist distension and pain may be caused by fasciitis, urinary system diseases, lumbar spine diseases and other reasons. 1. Fasciitis: If you suffer from fasciitis, the stimulation of inflammation can cause lumbar distension and pain. 2. Urologic diseases: If you suffer from pyelonephritis and other urinary diseases, you may experience discomfort in the kidney area, which may cause lumbar distension and pain. 3. Lumbar spine disease: If the lumbar disc herniation compresses the nerves, it can also cause lumbar distension and pain. It is recommended to go to the regular hospital in a timely manner to consult the chronic lumbar distension, clear the cause of the disease, standardized treatment under the guidance of the doctor, so as not to delay the condition of the body to bring about adverse effects, to the body to increase the additional burden.