Psoriasis and Papulosquamous Disorders.

Psoriasis is a chronic, inflammatory skin disease with a significant impact on quality of life. Psoriasis affects about 3% of the US population. Psoriasis is caused by an interaction between genetic and environmental triggers. Lifestyle modification and topical therapies such as emollients, topical corticosteroids, vitamin D analogues, and calcineurin inhibitors are used for limited disease. More severe psoriasis may require systemic therapy with available oral or biologic therapy.