In the Qing Dynasty literary sketches has many ”cross the leprosy story”, these skin disease story has had two important components: One is skin disease custom, one is righteousness husband chaste widow's plot. This article is for the purpose of the origin, the background and the influence which discusses this both to form, and involves related ”skin disease sickness” slightly basic cognition. The main elaboration has with emphasis four: (1) the Sung Dynasty beforehand skin disease sickness idea, (2) Sung Dynasty skin disease custom, (3) Ming Dynasty related skin disease has gotten sick story, (4) Qing Dynasty literary sketches skin disease story content analysis.