What should you know about carbuncle sore?

Several nearby hair follicles become infected and join beneath the skin. The area may feel firm, hot and painful, then develop several openings that drain pus. Redness can spread around it, and the skin may be sore when clothing or movement rubs against it. Carbuncles commonly occur on the neck, back, thighs or other areas exposed to friction. They can pass bacteria to another person through drainage, shared towels or close contact.

Keep the area clean and covered with a fresh dressing if it is draining. Wash your hands before and after touching the dressing, and do not squeeze, pierce or cut the sore. Warm, moist compresses may ease discomfort and encourage gentle drainage. Use separate towels and wash clothing or bedding that touches the area. A clinician may recommend [Antibiotics For Skin Infection](/treatments/medical-dermatology/antibiotic-therapy-for-skin-infection/) or [Abscess Drainage](/treatments/minor-procedures/abscess-drainage/) after examining its depth and spread.

Arrange prompt medical assessment if the sore is enlarging, very painful, repeatedly draining, or surrounded by spreading redness. Seek urgent help for fever, chills, marked weakness, confusion, red streaks, or swelling near the eye. People with diabetes, reduced immune defences, or recurring boils should be assessed early because infection may need closer monitoring.

Ask whether the lesion needs drainage, whether a sample should be tested, how to dress it, and which changes should trigger urgent review.