Psoriasis is a chronic Inflammatory Disease that targets principally the Skin and one that is possibly of autoimmune aetiology. Skin in many patients becomes reddened and scaly (psoriatic plaques) due to inflammatory reactions and excessive production of skin in these localised areas. There is no general pattern to the distribution of plaques and several forms have been identified. Plaques may occur, among other regions, on the legs and arms, at the joints, on the genital organs or on the scalp.
