Psoriasis is a non-infectious, inflammatory disease of the skin. It is characterized by well-defined erythematous (reddish) plaques with large adherent silvery scales. The main abnormality in psoriasis is an increased proliferation of the skin layers due to excessive division of the cell in the basal layers of the skin. Severe itching may associate with the plaques. Dryness of the skin and silvery scaling are characteristics of this condition. ..more
