Suggest Treatment For Fever Accompanied By Knee Swelling And Pain

Hi Doc, I am a female 38. I am running fever since yesterday and having severe pain and swelling in my knee downwards. Yesterday I got myself examined and the Doc gave me an injection of Voveran and it was a huge relief. But again I had a fever and severe pain today morning 102.6 and again doctor administered me an injection of voveran with Calpol 650 SoS. Pls suggest what is this and what further remedy is available