There is no cure for psoriasis, but recent research has led to improved understanding of the disease. Several new biological therapies target specific steps in the pathogenesis of psoriasis, and enhancements in topical therapy and phototherapy have improved the armamentarium of effective suppressive treatments.
Psoriasis is a chronic inflammatory, immune-mediated disease that predominantly presents with skin and joint manifestations. It is common, affecting 2% to 3% of the worldwide population. Once psoriasis has appeared as a localised disease, it persists throughout life, manifesting at unpredictable intervals. It is not contagious.