穿羽绒服轻便、美观、暖和,盖羽绒被柔软、舒适、温暖。但是,有些人穿羽绒服或盖羽绒被后,全身会出现大小不等、形状不一、颜色较浅、周有红晕、略高出皮肤、瘙痒难忍的中硬性丘疹或团块,这些丘疹被称为荨麻疹;也可表现 Wear down jacket lightweight, beautiful, warm, covered duvet soft, comfortable and warm. However, some people wear down jackets or cover duvet, the body will appear in different sizes, different shapes, lighter colors, blush weeks, slightly above the skin, itching unbearable middle hard papules or lumps, these papules are Known as urticaria; also performance