Chronic nonspecific synovitis-rheumatoid

Hi Sir, I was having acute pain and swelling in my left knee and was diagnosed to be synovitis swelling. I was suggested to undergo a surgery and I have underwent the surgery at Ganga hospital Coimbatore. However post surgery I was fine for 4 days and after 4 days the swelling re-appeared. In the biopsy results it wasn't clear on the root cause and was mentioned "chronic non specific synovitis - Rheumatoid?" Due to the swelling post surgery I was not able to walk for almost a month. Currently I am able to walk and the flexibility of the knee is around 130 degrees. Can it be because of Rheumatoid that I am feeling more pain when trying to bend beyond 130 degrees. I am worried that I might never be able to be normal as I used to be. Please help me understand my problem. Is Rheumatoid non curable disease? Thanks, Rakesh