Carbuncle on the skin: what to know

A carbuncle on the skin is a cluster of connected boils causing deeper inflammation, tenderness and sometimes pus-filled drainage. It can occur on areas with hair follicles and may spread across nearby skin. The surface may develop several openings rather than one central spot. Do not pop or lance it, since pressure can push infection into surrounding tissue and contaminate hands or surfaces.

The affected skin can be red, warm, swollen and firm. Pain may increase when clothing rubs the area. A carbuncle can begin after bacteria enter a small cut, irritated follicle or broken patch of skin; this does not always reveal a single obvious cause. A healthcare professional can distinguish it from acne, an inflamed cyst or another skin problem by examining its depth and drainage.

Gently clean around the area, pat dry and place a clean dressing over any drainage. Wash hands after contact and launder towels, bedding and clothing that touch the lesion. Avoid shaving over it and do not apply harsh chemicals. Medical care may include [Antibiotics For Skin Infection](/treatments/medical-dermatology/antibiotic-therapy-for-skin-infection/) when appropriate, or [Abscess Drainage](/treatments/minor-procedures/abscess-drainage/) if a collection needs to be released safely.

Contact a clinician promptly if redness is expanding, pain is becoming stronger, drainage is heavy, or the carbuncle is not settling. Seek urgent care for feverishness, chills, confusion, faintness, red streaks or rapidly worsening swelling. Early review is especially sensible with diabetes, immune suppression, circulation problems or a history of recurring boils.

Ask what diagnosis best fits the lesion, whether it needs a drainage procedure, how long to use a dressing, and how to reduce spread to household members. Tell the clinician about allergies, medicines, previous similar infections and any recent skin injury.