In the Traditional Chinese medical literature of ancient times, Bi referred to the pathogenesis, or the symptoms as well as the name of the disease. As the name of a disease, Bi has the different meanings of broad and narrow., joint-running, joint-running wind, white tiger joint-running, gout etc. referring to the narrow meaning of Bi disease. The theory of etiology and pathogenesis of the narrow meaning of Bi disease developed from damp-impediment, wind-cold-damp impediment to damp-hot impediment, stasis-hot impediment, which reflected the constant deepening of cognition.