<s>[INST] I got hit by a car a while ago and damaged my knee. They diagnosed a clack in my shin a month later but have said this has since healed. I still keep getting pain and it feels like pressure builds inside my knee, whenever I get the pain or the knee cap click I get a small bruise appear around the edge of the knee cap. It doesn't occur in the same place but moves all around the edge of the knee cap. I don't know if you can help? Thanks. [/INST] Hi, there!MRI scan of knee joint will be useful to diagnose meniscal tear/subluxation.Knee clicking/blocking and swelling is meniscal tear sign.I hope this helps </s>