Researchers have linked psoriasis to genetic activity involved with the development of the vascular system, a discovery that could lead to additional therapies for treating psoriasis.Psoriasis is a lifelong skin disease that occurs when faulty signals in the immune system cause skin cells to regenerate too quickly. Extra skin cells build up on the skin’s surface, forming red, flaky, scaly lesions that can itch, crack, bleed and be extremely painful.