What Are Those Bumps on My Arms?

 Half of Us Have KP and Don’t Know ItKaren Smith, who manages a Web site for sufferers of KP, writes that the condition affects approximately 40 to 50 percent of the adult population and 50 to 80 percent of adolescents, with varying severity. Most people with KP, according to Smith, don’t know they have it, usually because they don’t know about their condition and therefore mistake their symptoms