紫癜,是红细胞渗出于血管外所致皮肤、粘膜的色泽改变,临床上分为血小板减少性紫癜和血小板不减少性紫癜。血小板减少性紫癜的病因是患者体内存在抗血小板因子抗体或造血细胞异常,使血小板生成不良或破坏过甚,血小板明显低于正常。表现为持续的或反复发作的泛发于身体任何部位或器官的出血倾向,皮肤上出现“乌青块”样出血斑块;更严重的是粘膜和内脏出血,长期不愈,导致重度贫血,甚至可危及生命。血小板不 Purpura, erythrocyte effusion in the skin caused by extravascular, mucosal changes in color, clinically divided into thrombocytopenic purpura and platelet does not reduce purpura. The cause of thrombocytopenic purpura is the presence of anti-platelet antibodies or hematopoietic abnormalities in patients with poor platelet destruction or destruction, platelets significantly lower than normal. Manifested as persistent or recurrent panic in any part of the body or organ bleeding tendency, the skin appear “black block ” -like bleeding plaque; more serious mucosal and visceral bleeding, long-term unhealed, resulting in severe Anemia can even be life-threatening. Platelets do not