A boil , carbuncle , and furuncle are related skin infections, often caused by bacteria, particularly Staphylococcus aureus . Here's a breakdown of each: Boil (Furuncle) : A boil or furuncle is a painful, pus-filled bump that forms under the skin when bacteria infect and inflame one or more hair follicles. It starts as a red, tender area that becomes firm and hard. Over time, the center of the boil softens and fills with pus, forming a head. Boils can occur anywhere on the body but are commonly found on the face, neck, armpits, shoulders, and buttocks. Carbuncle : A carbuncle is a cluster of boils that are connected to each other under the skin. It’s a deeper and more severe infection than a single boil, often causing a more significant and painful swelling. Carbuncles can lead to symptoms like fever and fatigue, and they are more likely to leave scars than boils. They are typically found on the back, neck, or thighs, where the skin is thicker. Treatment : Boils and carbuncle...