求翻译：过敏性紫癜又称亨-舒综合症，是一种常见的血管变态反应性出血性疾病。由于病原体感染、某些药物作用、过敏等原因，体内形成IgA或IgG类循环免疫复合物，沉积于真皮上层毛细血管而引起血管炎。主要表现为皮肤紫癜、黏膜出血、腹痛、 皮疹、关节痛及血尿，多见于儿童及青少年，男性多于女性，春秋季发病居多。是什么意思？

Henoch-Schonlein Purpura, also known as Heng-Shu syndrome, bleeding is a common allergic vascular disease. Due to pathogens, infection, certain drugs, allergies and other reasons, the in vivo formation of circulating immune complexes IgA or IgG class, deposited in genuine leather upper capillaries due to Vasculitis. Mainly for skin Purpura, mucosal bleeding, abdominal pain, skin rash, joint pain and hematuria, seen in children and adolescents, men more than women, incidence of spring and autumn, the majority.