Though all pimples form the same way, they often take on different shapes and characteristics, and react differently on different people. Acne is formed when a hair follicle becomes clogged and what is called a comedo is formed. As the follicle becomes clogged with more oil, the comedo becomes larger, inflaming the skin around the area and forming what we know of as a pimple. There are several types of acne, each requiring different methods of Acne treatment. This article covers some of those types, explaining each and making treatment suggestions.
Non-inflammatory acne often takes the form of a closed comedo, or whitehead. This occurs when the plugged hair follicle stays beneath the surface of the skin, and appears on the skin as a small whiteish bump.
An open comedo, or blackhead, occurs when the plug enlarges and pushes through the surface of the skin. Its dark appearance is not due to dirt, but rather to a build up of the dark pigment of the skin called melanin. Blackheads are also a type of inflammatory acne.
The mildest form of inflammatory acne is a papule, a small, firm, pink bump appearing on the surface of the skin. These bumps can be tender to the touch, and are often considered an intermediary step between non-inflammatory and inflammatory acne.
Pustules are like papules in that they are small, round lesions. Unlike papules, pustules are clearly inflamed and visibly contain pus. They may appear red at the base with a yellowish or whiteish center. Pustules do not generally contain a great deal of bacteria, but are inflamed due to chemical irritation from sebum components.
Nodular or cystic acne is usually very painful. Nodules are inflamed pus-filled lesions lodged deep within the skin. They develop when the contents of a comedo has spilled into the surrounding skin and immune system responds, producing pus. The most severe form of this type of acne may persist for weeks or even months, eventually hardening into a cyst. Both nodules and cysts often leave deep scars.
Acne conglobata, a rare form of inflammatory acne, forms primarily on the back, buttocks, and chest.
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