dermatologic disorders
Furuncles and Carbuncles
Key Points
Suspect a furuncle if a nodule or pustule involves a hair follicle and discharges necrotic tissue and sanguineous pus, particularly if on the neck, breasts, face, or buttocks. Culture furuncles and carbuncles. Drain lesions. Prescribe antibiotics effective against methicillin-resistantStaphylococcus aureus(MRSA) for patients who are immunocompromised, febrile, or at risk of endocarditis; for lesions<5 mm that do not resolve with drainage; and for lesions that are > 5 mm, multiple, or expanding. 