Hi ! Good morning. I am Dr Shareef answering your query. It seems to me that you developed a hematoma (collection of blood) around your knee which has now organised. If the swelling has become hard and warm, possibly this has become inflamed and needs to be shown to an orthopedic surgeon at the earliest, who after a personal physical examination might advise you for an MRI of the injured knee joint of yours to reach to a nearest diagnosis. Further management would depend on the clinical findings, and investigation reports. Till that you could go for an anti inflammatory drug with a proton pump inhibitor. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. Wishing you an early recovery. Dr Shareef.