Acne vulgaris is simply the medical term for pimples or spots. It's the lucky few who get through life without zits or pimples. (Usually appearing on the eve of a big date, the disease has a cruel, but uncanny, sense of timing.)
Acne vulgaris usually appears on the face and shoulders, but infection of the back is also quite common. Whiteheads develop first, as the hair follicles become clogged and infected. A whitehead is a small, pinhead-sized spot. As the hair follicle expands from its internal pressure, the contents push upwards and turn a darker color, forming blackheads.
When a whitehead or blackhead ruptures, its infected contents come into contact with the skin, spreading the infection. This is when pustules form. Pustules are inflamed pus-filled areas of skin: classic zits. If zits become badly infected they can become cysts, an extreme form of pustule that is rooted deep in the skin, and can be quite painful. Cysts can lead to scars.
Acne Information: Name that Zit!
- whitehead: an infected hair follicle that remains under the skin
- blackhead: that same hair follicle if it breaks through the skin's surface
- nodule: a solid skin lesion that is often painful and buried deep in the skin
- pustule: an inflamed, pus-filled area of skin infected by material from a ruptured whitehead (a.k.a. a "pimple")
- cyst: like a pustule gone bad that goes deep into the skin and can lead to scarring.
Keloid and Acne Scars
Severe scars can give a face a "cratered" appearance, such as the acne scars borne by actors James Woods and Tommy Lee Jones. Some treatments are designed to reduce the chances of scarring. Most mild to moderate acne does not result in scarring or keloids.
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