Individuals with psoriasis experience an immune system in a state of excited fervor, a hyperactivity that sparks inflammation and spurs on a hasty regeneration of skin cells. Consider your T-cells. These diligent cellular entities are meant to identify and expel intruding pathogens. But in psoriasis-endowed individuals, an over-zealous activation of T-cells catalyzes a cascade of immune responses, prompting a misguided attack on the body's own cells.