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Psoriasis is a chronic skin condition that accelerates the rate at which your skin cells grow. An effective method to treat psoriasis is phototherapy or light therapy.

Psoriasis is an auto-immune illness that affects almost three percent of the world's population. People who suffer from psoriasis experience a great deal of skin irritation and discomfort.

Psoriasis can be classified into five types: plaque, guttate, inverse, pustular, and erythrodermic. The types vary in terms of site of disease and characterization of lesions. Erythrodermic psoriasis is the rarest and plaque psoriasis is the most prevalent type affecting patients all over the world.