Psoriasis is a chronic, genetic, incurable, non-contagious skin disorder that appears in many different forms. A disease of the immune system, its causes are still largely unknown. Healthy skin grows and sheds at a steady pace that goes mostly unnoticed. This process takes about one month. With psoriasis, the immune system sends faulty signals that speed skin cell growth up 10 times faster than normal.
As the epidermis thickens with extra skin cells, blood vessels dilate with increased blood supply to nourish those cells. Dead cells pile up on the surface to create a white, flaky layer over a patch of inflamed skin.
Treating Psoriasis
Psoriasis, depending on its severity, is generally treated by a combination of topical, ultraviolet light and systemic therapies. The vast majority of these methods are difficult and time consuming to apply. In addition, many of the more effective treatments, for example UVA, UVB or PUVA, may carry severe potential side effects such as an increased cancer risk.
Using ultraviolet light, it is thought, damages skin cells and interrupts immune functions.
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