江苏读者冯梅问：我是一名幼儿教师，近半年来发现班里有的孩子在环境温度变化时感到皮肤瘙痒，特别是夜间明显，开始多是两下肢痒，逐渐波及全身。由于剧烈搔抓，皮肤可见条状划痕或血病，影响睡眠和活动。孩子为何皮肤瘙痒？应采取什么措施？冯梅同志：孩子皮肤瘙痒原因是多? Fengmei, Jiangsu Reader Q: I am a kindergarten teacher. In the past six months, some children in the class found itching when the ambient temperature changed. Especially during the night, they started to feel itchy and gradually spread to the whole body. Due to severe scratching, the skin visible strip scratches or blood disease, affecting sleep and activity. Why do children skin itch? What should be done? Fengmei comrades: What is the cause of child skin itching?