The skin is made up of three layers, the outermost being the epidermis.  Typically, cells generate beneath the skin’s surface, slowly making their way to top at which point they are shed.  This process, which takes 30 days in healthy individuals, takes 3-4 days in psoriasis sufferers.  The consequence of this overly rapid process in psoriasis patients is a pile up of dead cells on the skin’s surface, producing thick, scaly patches.  Watch this video for more facts about psoriasis.