Through a historical investigation of the changes in the understanding of diarrhea and related health problems, as well as a review of the main categories under which such problems were analyzed, this study shows that the meanings of xie, and li had gone through many phases of change since medieval. China. Med description on the symptoms clinical treatments of these problem manifested not only the ups and down and many twists and turns in the development of Chinese medical knowledge and clinical abilities , but also the continuous interaction between such an evolving medical tradition With the actual ebb and flow of pediatric health . The final section of this study demonstrates how a sophisticated methodology may lead to a grasp in the changing patterns of pediatric diseases through systematic examination of the medical records, and produce in turn a better picture of general pediatric health in the past through these disease patterns.