<s>[INST] I fell approximately one week ago on a concrete walkway. Badly skinned my left knee (I was wearing slacks); it s still quite painful to bend my knee. Tonight I noticed that directly below the skinned area, it is swollen and warm to the touch. (Yellowish like an aging bruise; no redness) Should I be overly concerned? [/INST] Hi, It is due to local inflammation or contusion. As of now you can use analgesics/anti inflammatory combination like Aceclofenac/Seratiopeptdase for symptomatic relief. You can also apply ice packs for faster recovery. If symptoms persist, it is better to consult a physician and get evaluated. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Shinas Hussain, General & Family Physician </s>