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Wysłany: Śro 11:17, 01 Gru 2010 Temat postu: Puma Sneakers What Causes Acne Puma Complete Vecta |
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The Different Types of Acne
Pustules – Pustules are similar to papules, but they contain a white, pus-filled tip on the top of their surface. They range in size, but are usually swollen, red, and tender. They are usually formed when a papule is not treated and allowed to grow.
There are three major contributors to the cause of acne: sebum (oil) production, bacteria, and the shedding of dead skin cells. The sebaceous glands, also known as oil glands [link widoczny dla zalogowanych], are constantly monitoring and producing the oil that lubricates our skin and hair. These glands are connected to our hair follicles. The glands produce the sebum, and then the sebum usually travels up the hair shaft and to the skin. Acne occurs when the other contributors, dead skin cells and bacteria, are also present.
Comedones – Pronounced “kom-uh-dones”, this category is the mildest of all acne groups and is comprised of what are commonly referred to as blackheads and whiteheads. Blackheads are what occur when the pore is left open. The melanin in dead skin cells reacts with exposure to the sun, causing the debris to turn darker. Whiteheads are a result of the pore being closed over. This pressure often causes the walls of the follicle to rupture, causing the skin to become irritated and red.
What Causes Acne?
Papules – Papules are tiny red bumps that do not have a visible head on the tip and usually occur in the area where fine, thin hair grows, such as on the cheek or along the hairline. When bacteria is present below the surface, causing a mild infection, the skin turns red. The American Academy of Dermatology defines as papule as less than 5 millimeters in size and a slightly elevated above the skin.
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Additional factors, such as hormones and hereditary characteristics, as well as medications can also aggravate or alleviate breakouts. However, the American Academy of Dermatology reports that contrary to popular belief, stress, diet and poor hygiene actually have little to do with the onset of acne breakouts.
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