I have acl grade 1 sprain and mild degeration of right knee...pain was not much bcz I have restrained my activities also my vit D is 4.6 for which I am taking medicines But after doing pysio for 2 days i was getting mild pain but day 4th day was right knee started paining badly and swelling was there. And exercises I was doing was very basic and I have no problem in left leg while doing those exercise infact it feels stronger bcz now when I am wearing brace in the right knee ..my left leg is handling the pressure well I am in a lot of pain Can't understand why basic exercise is making knee painful . Please help me Thanks in advance