第二节过敏性紫癜【概述】过敏性紫癜（anaphylactoidpurpura）也称亨-舒综合征（Henöch-Schöhleinsyndrome，Henoöch-Schönleinpurpura，HSP），是一种以小血管炎为主要病变的系统性血管炎，临床表现为皮肤紫癜，常伴关节炎、腹痛、便血和肾小球肾炎；多发于学龄前和学龄期儿童，男孩多于女孩，一年四季均有发病，以春秋两季居多，国内报告HSP患病率有逐年增高趋势。
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