<s>[INST] I fell onto a tiled floor a week ago today, my right knee is cut and bruised but a lump came up almost immediately. it is still there now at the top of my kneecap, my knee is sore and warm to the touch but I can walk without problem. Just feels stiff but I thought it was because of the grazes I sustained to it. Any ideas? [/INST] Hi ! Good evening. I am Dr Shareef answering your query. You might have got a hematoma of the knee (blood collection) due to the trauma. Walking without problem signifies that the joint ligaments and cartilages are possibly not injured. If there is no fresh ooze, the hematoma may gradually subside with absorption, but it would need proper rest and splintage of the joint. In case the problem increases which interferes with your walk, then you might have to see an orthopedic surgeon in your area, who might advise you for an x-ray/MRI of the injured knee joint. Till that you could start taking an anti inflammatory drug. Further management in that case would depend on the MRI report.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. </s>