Nearly 17 million people in the United States have acne, which makes it one of the most common skin diseases. Acne is most common in teenagers and young adults, and does not discriminate among races. Nearly 85 percent of people between the ages of 12 and 24 get acne at one time or another, some more than others. For most people, acne goes away by age 30. But some people in their forties and fifties still get acne.
The process by which a pimple develops is highly intricate. The exact cause of pimple formation is unknown; however, we do know that a pore collapses on itself and blocks sebum (oil) from escaping. Scientists are working on figuring out why this process takes place in one sebaceous gland and not in others.
While we don't understand exactly what causes acne, we do know that hormones, diet, vitamin deficiency, stress, evolutionary biology (just to name a few) play a role in the formation of acne. Most pimples are found on the face, neck, back, chest and shoulders. While acne is not a serious health threat, it can cause physical and emotional scars.
Pimples grow when body hair, sebum (oil), and skin cells clump together into a plug. Bacteria in the plug cause swelling. When the plug starts to break down, a pimple appears.
Because many factors cause pimples, time is better spent on finding and testing an effective treatment.
The most common types of pimples are:
1. Whiteheads. These are pimples that stay under the surface of the skin.
2. Blackheads. These pimples rise to the skin's surface and look black. The black color is not from dirt.
3. Papules. Tender, small pink bumps that appear on the surface of the skin.
4. Pustules. Pimples that are red at the bottom and have pus on the top.
5. Nodules. Large, painful, solid pimples that are deep in the skin.
6. Cysts. Deep, painful, pus-filled pimples that also cause scarring.
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