Hi Hope this message finds you in good health. I have gone through your complaints and understand your concern. I generally see many cases like this at my sports clinic.I give them a splint,rest,analgesics,anti-inflammatory tablets and ice pack till the swelling reduces to some extent. Then i get an xray and if necessary an mri done to find out the extent of the lesion. In your case,there are 3 possibilities- POSSIBILITY 1. Soft tissue inflammation- there may be no bony injury,only the soft tissues around the knee might have been strained causing inflammation inside the joint. POSSIBILITY 2. bursitis- the bursae around the knee may get inflammed causing pain and restriction of movements.this is generally caused due to some derangements in blood or a local strain POSSIBILITY 3.gout-there might be raised uric acid in the blood causing uric acid crystals to get deposited in the knee that might cause painful knee movements a detailed blood profile and an xray/mri would be of immense help to come to a diagnosis. . All the above possibilities have a good prognosis and you should eventually get back to normal in coming few days.Nothing to worry about.Do get back to me after ur mri reports are ready. I hope your question has been answered. If you have any follow-up queries,feel free to consult me anytime. Thanks,Take care,God bless.