Terminology
The term acne comes from a mutation of the Greek ἀκμή (akmē), literally "point, edge", but in the sense of a "skin eruption" in the writings of Aëtius Amidenus. Used by itself, the term "acne" refers to the presence of pustules and papules. The most common form of acne is known as acne vulgaris, meaning "common acne". Many teenagers get this type of acne. Use of the term "acne vulgaris" implies the presence of comedones.
The term "acne rosacea" is a synonym for rosacea, however some individuals may have almost no acne comedones associated with their rosacea and therefore prefer the term rosacea. Chloracne is associated with exposure to polyhalogenated compounds.
Read more about this topic: Acne Vulgaris