What should you know about carbuncle on knee?

The infection involves several nearby hair follicles and creates a deeper area of inflammation. The skin may be hot, red, swollen, firm, and painful, with pus draining from multiple points. Kneeling, tight clothing, or a scrape can add friction. A swollen bursa, infected wound, cyst, or joint-related problem can resemble a skin infection, so movement and examination are relevant.

Keep the knee clean and dry, cover drainage with clean gauze, and avoid kneeling or rubbing the area. Rest the joint in a comfortable position and use a warm compress without pressing on the lump. Do not pierce or squeeze it, and do not apply leftover antibiotics. A clinician may use prescribed antibiotics or drainage; related reading includes Antibiotics For Skin Infection and Abscess Drainage.

Seek urgent medical help if the redness spreads, the knee becomes difficult to bend, pain is severe, fever or chills develop, red streaks move up the leg, or you feel weak or confused. Immediate assessment is also needed if the swelling seems deep inside the joint, follows a significant injury, or is accompanied by inability to bear weight.

Ask whether the infection is limited to skin, whether fluid needs to be drained or tested, how to protect the knee while walking, and which symptoms suggest joint involvement. Tell the clinician about diabetes, immune problems, recurrent boils, recent falls, wounds, injections, and medicine allergies.