I had a TKR on the right leg on July of last year 2017. Since then I have 7 infections on my right calf , CELLULITIS, my leg now resembles a side of corned beef, (yuk), my leg and knee are still swollen although not as bad as just after the operation. At one time my knee actually saw/felt some improvement with exercises and ice for the swelling but in the past 4 weeks the pain has returned with a vengeance . I have trouble with my left knee and am waiting for a referral with the MSK clinic, with the pain from my left knee and excruciating pain from my new knee after the TKR it gets very painful getting up from a sitting position I have to grab items of furniture to help me stand up as its so painful. I just keep being told to give it time it can take up to 18 months to recover from the op, i'm a man in his early 60's and was off work since my operation I say was as I have now lost my job due to ill health as my employers put it.
I think this isn’t normal, I’ve had two replacement , one 7 years ago and 7 months ago , I haven’t really had pain since about 10 wks , very little swelling and have t used ice for months . I would get it looked at and use a different surgeon . I don’t know what country you are in or how easy to go to different surgeon but I think yours needs investigating