Background and and purpose : The aim of this study is to define the concept and to arrange symptoms of Blood stasis(瘀血) by review of other thesises, literatures connected with it and reserch trend, in order to making a questionnaire of Blood stasis(瘀血) Methods: By review of other thesises and literatures connected with it, we defined the concept and arranged. symptoms of Blood stasis(瘀血). Results: The concept of Blood stasis(瘀血) is summarized as stasis of blood, pollutant of blood and external blood of vessel. The causes and Symptoms of blood stasis is arranged. Conclusion: Review of literatures led to the selection of 48 items describing blood stasis pattern(瘀血證)