Acne is the most common skin condition in the United States. It can cause blackheads, whiteheads, and pus-filled spots.
According to the American Academy of Dermatology, 40-50 million Americans have acne at any one time.

Acne tends to start at puberty, and most people experience it during this time before it resolves itself in the late teens or early 20s. For some people, however, it can persist into their late 20s and even 30s.

Its severity can vary from just a few spots to larger clusters of affected areas. As well as on the back, acne can appear on the face, neck, and chest. If acne is left untreated, dark spots and permanent scars can appear on the skin as it clears.
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