中文摘要：

证候是对疾病某一阶段病理生理变化的整体反应状态的概括,一个完整的证候诊断通常包括病位要素和病性要素两部分,证候要素的诊断依据应该是一组症状的组成部分即症状的临床特征。通过建立中医症状病机数据库,经过分析与筛选发现,血瘀的特异性症状的临床特征包括（月经、恶露）血块、（面色、口唇、舌质、甲床、月经、恶露）紫黯、（皮下、舌质）瘀斑、（腹部、额头）青筋暴露、（皮肤）蛛丝红络、（头部、胸部、胁部、脘腹、少腹）刺痛、（头部、胸部）固定痛、（胸痛、胁痛、脘腹痛）夜间加重。在临床实践中,以上8个症状的临床特征中的任意一个出现都可直接辨识为血瘀。

英文摘要：

Syndromes summarize the whole reaction condition about pathological and physiological changes at a certain stage of disease. A complete diagnosis of syndrome usually includes two parts,the element of disease location and the element of disease nature. The diagnostic basis of the syndrome element is a constituent part of a group of symptoms,namely clinical features of symptoms. By establishing database about pathogenesises of Chinese medical symptoms,through analysing and selecting,the researchers found clinical features of specific symptoms of blood stasis including（ menstruation and lochia） blood clots,（ complexion,lip,tongue nature,nail bed,menstruation and lochia）dark purple,（ skin and tongue nature） ecchymosis,（ abdomen and forehead） prominent veins,（ skin） red collaterals like gossamer,（ head,chest,flank,gastral cavity and abdomen） stabbing pain,（ head and chest） fixed pain,and（ pain in chest,flank,gastral cavity and abdomen） exacerbation at night. In clinical practice,any one of clinical features of above 8 symptoms can directly identify the element of disease nature about blood stasis.