While normal skin cells are shed unnoticed, psoriasis skin cells build up and form raised, scaly lesions. It affects people differently, and its course is not easy to predict. Skin involved with psoriasis becomes red from the increased blood supply to the rapidly dividing cells. The white scale, called plaque, is composed of dead skin cells that build up on the skin's surface. The severity of each case is categorized by the percent of the body involved with psoriasis.
Mild cases involve only a few lesions.
Moderate cases cover 5 to 10 percent of the body. Severe cases involve more than 10 percent of the skin surface, and, in rare cases, may include all of a person's skin. It is not contagious. Psoriasis does not spread on an individual's skin because of self-contagion. The more you understand about psoriasis, the more you'll be able to help the children who have psoriasis manage the disease.