What Causes Knee Inflammation With Tightness After Surgery?

Hi, may I answer your health queries right now ? Please type your query here... I had knee surgery a 1 1/2 ago and it is still hot to touch at times, tight, feels like when I do break the scar tissue lose it comes right back. I had the Rou Gold thwait procedure and need the other knee done. I have gluten sensitivity ( very sensitive ) with the herpetiformis dermatisis.
Thanks
Teresa