What does furuncle mean?
A furuncle, known in everyday speech as a boil, is a painful swelling of the skin caused when bacteria—most often Staphylococcus aureus—infect a hair follicle. The body responds by walling off the infection, producing a red, tender nodule filled with pus that can grow to a centimetre or more across and may eventually rupture and drain. Furuncles most commonly appear on the face, neck, armpits, buttocks, and thighs, wherever friction and sweating are frequent. While a single boil usually resolves on its own or with incision and drainage, repeated episodes—a condition called furunculosis—can signal an underlying problem such as immune impairment or persistent staph carriage, and warrants medical evaluation. Clinicians prefer "furuncle" over "boil" for its precision, reserving the related term "carbuncle" for clusters of interconnected boils. The word's origin is memorably odd: it descends from the Latin furunculus, a diminutive meaning 'little thief,' as if the lesion quietly pilfers one's wellbeing under the skin.
nounA painful, pus-filled boil on the skin caused by bacterial infection (typically Staphylococcus aureus) of a hair follicle.
- A deep bacterial infection of a hair follicle producing a painful, pus-filled nodule (a boil); the standard medical term for this lesion.
"The physician lanced the furuncle and prescribed a course of antibiotics to clear the infection."
"What began as a tender red bump on his neck developed into a furuncle that needed medical drainage."
"Recurrent furuncles can be a sign of an underlying condition or of carriage of Staphylococcus aureus on the skin."
Standard plural; used freely in both clinical and general medical contexts.
"She was prone to furuncles during periods of stress and poor nutrition."
Its name comes from the Latin for 'little thief' — a fitting title for an infection that sneaks up under your skin and steals your comfort.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of furuncle
The word furuncle comes from the Latin furunculus, a diminutive of fūr, meaning "thief" — so the term literally translates as "little thief," a whimsical Roman metaphor for an affliction that steals rest and comfort. The Latin term entered medical usage and was adopted into English in the early modern period as clinical terminology. The same Latin root fūr gave English the words "furtive" and "furtively," which retain the sense of stealthy, thievish behaviour.
Related word forms
How furuncle is actually used
"Furuncle" is the formal medical term; laypeople almost always say "boil." It appears mainly in clinical writing, dermatology texts, and patient-education material rather than everyday conversation.
Easily confused with furuncle
A carbuncle is a cluster of interconnected furuncles (boils), typically larger and deeper than a single furuncle.