Acne Vulgaris:-
Acne is a condition that develops in and around the hair follicles and their oil-producing glands, called the sebaceous glands, in the skin. These glands occur everywhere over the skin surface with the exception of the palms of the hands and the soles of the feet. Each gland is composed of a number of epithelial cells that is continuous with the surface lining of the skin. As the skin regenerates, these epithelial cells are shed and passed out of the sebaceous glands via the gland ducts in a secretion known as sebum.
Stages of Acne:-
Types of Acne Vulgaris: In order to understand the different types and stages of acne vulgaris, the entire spectrum must be broken down into a format that's easiest to understand. The two main types of lesions are Noninflammatory and Inflammatory.
Noninflammatory lesions are called comedos and can result in whiteheads or blackheads. Whiteheads occur when trapped sebum and skin cells stay just BELOW the skin's surface. Blackheads occur when the trapped sebum barely breaks through the skin's surface. The trapped sebum oil turns black due to the exposure and should not be confused with dirt. Whiteheads and blackheads do not contact bacteria. However, pimples, (see below) do contain bacteria.
Inflammatory acne consists of pimples and zits (papules and pustules) and in worst cases, nodules and cysts. Nodules are large, painful, solid lesions that are lodged deep within the skin. Cysts also lay deep within the skin but are filled with pus instead of being solid. Both types can produce scarring.
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