紫癜、血小板与凝血因子文／武中图／周明清人体对出血有一整套的控制系统，包括血管、血小板和凝血因子三大方面。这些环节中任何一个出问题都会造成出血不止。首先，在血管性疾病中，最常见的是过敏性紫癜。可在服用某些药物及食物后发病，出现全身皮肤的出血点、便血、... Purpura, platelets and clotting factor text / Wu in the picture / Zhou Mingqing human bleeding have a set of control system, including blood vessels, platelets and clotting factors in three areas. Any one of these problems can cause bleeding. First, in vascular disease, the most common is anaphylactoid purpura. Can take some drugs and food after the onset of systemic skin bleeding point, blood in the stool, ...