The most common causes are problems with the lumbar spine itself, such as lumbar disc herniation, lumbar spinal stenosis, and lumbar spine slippage, all of which cause nerve damage and sinus nerve injury, causing local lumbar pain as well as radiating pain in the legs. 2. It may be fasciitis, and lumbar dorsal fasciitis can cause pain in the lumbar region, sometimes radiating to the thighs or calves. The first thing you need to do is to take a look at the results of the study.