Hi Sir, I had a minor cut in my posterior knee of my left leg 10 days ago. The cut got healed in 2 days but I had some swelling and infection over there which again took 2 days to heal of course after taking some medicines. But till now I am not able to straighten my knee to its fullest and even my ankle movement is restricted. If I try to do it beyond a certain point, it pains and I am not able to do it further. I am not even able to walk with that leg. What's the cause and treatment? Please help!