Psoriasis: as an Imitation of Skin, Scalp and Nail Infections

Psoriasis is a common inflammatory, hyperproliferative skin disorder that affects 1% to 2% of the world population. The clinical diagnosis of psoriasis is relatively easy, especially when the lesions consist of erythematous, silvery white scaly, sharply demarcated, indurated plaques. Psoriasis is a chronic dermatosis of genetic origin, often precipitated by an event such as an infection, an injury or psychological stress. There are many types of clinical presentations called plaque psoriasis, guttate psoriasis, flexural or inverse psoriasis, annular psoriasis, pustular psoriasis, erythrodermic psoriasis and also can be present on scalp and nails that should be differentiated from various possible infection.