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 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 injury. In your case,there are 3 possibilities- POSSIBILITY 1. Soft tissue swelling- there may be no bony injury,only the soft tissues around the joint might have been inflammed that causes the bruise POSSIBILITY 2. generalised condition- some blood related disorder may be causing spontaneous bruising anywhere in the body. POSSIBILITY 3.gout- there may be a raised uric acid levels in the blood that causes uric acid crystals to get deposited in some parts of the body But i assure one thing, even if it is either of the above 3,all have a good prognosis and you should eventually get back to normal in coming few days.Nothing to worry about. i advice you to get a detailed blood profile done to find out the exact cause and start appropriate medicines. Do get back to me after ur 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.