i had total knee replacement three months ago,since then i have had severe pain very bad burning sensation it feels like someone has poured acid on my knee the scar area gets very sore and it feels hot to the touch with redness,i cant even stand for my clothes to touch it,it comes and goes every day,bending my leg backwards is extremely painful if i go to far up,in the beginning they did not realize a nerve was affected but for awhile they gave me percoset 10 or 20 ,it got to where i could control it with 10 and one hydrocone 5,but in a few weeks they cut me down to hydrocone 7.5,now it takes on and one half of them and one hydrocone 5,how long will this pain last and is it a permanent condition it hurts more in the knee area but goes far down and up the knee a little ways,the hnee is very stiff most of the time and constantly painful.please explain,what comes next.thank you,m sue ragan oh yes they have put me on meloxicam and lyrica 150 mg. twice a day and it has helped a lot with the burning ,not the pain.