过敏性紫癜是儿科常见的出血性疾病之一,是一种以毛细血管炎为主要病理改变的变态反应性疾病。临床以臀部以下肢体皮肤紫癜,常伴有关节肿痛、腹痛、便血、尿血和蛋白尿为主要表现,多发生于2~8岁儿童,男孩多于女孩,一年四季均可发病,以春秋居多。本病受各种因素影响而反复出现, Henoch-Schonlein purpura is one of the common hemorrhagic diseases in pediatrics. It is an allergic disease characterized by capillary vasculitis as the main pathological change. Clinically, the following hips purpura skin diseases, often accompanied by joint swelling and pain, abdominal pain, blood in the stool, hematuria and proteinuria as the main performance, occurred in children aged 2 to 8, more boys than girls, can be disease throughout the year, Mostly. The disease is repeatedly affected by various factors,