I am 43 year old,, in the meg time I feel severe Knee Pain, Previously it was in the I night, now also some time I feel pain in the night, and later mrg, I feel heavy from my knee to toes, due to neurofibroma my nerves are pinched on both mu disc, because of that I have severe back pain, the pain is very severe, bcoz of that I no sound sleep, I am taking ultracet in the mrg and night, but no use, what could be the cause of knee pain.