4- ?5 years back I start feeling weakness / little pain in the below part of the left feet. I was feeling difficult to in walking due to left feet weakness. I went to Govt. Hospital 2 times. Doctors give me medicine and oil for massage. But there was no improvement. Then I visited to private hospitals 2?-3 times. They take some medical test and give medicine / massage oil. But there was not any improvement in the left feet. After 2-?3 year I start feeling weakness in left knee (voice when left knee is bend) and after some time start feeling weakness in left buttock. Weakness in left feet, left knee and left buttock has make difficult for me to walk and to sit on ground and on chair. Uric acid and all other reports are normal. I have consumedso many medicine written on prescription slips in last 4-?5 years but there is no improvement. Kindly suggest / recommend way out in detail to resolve weakness / little pain in below left feet, weakness in left knee and weakness in left buttock to resolve my problem while walking and while sitting on ground / on chair.