儿童天性好动,追追打打、蹦蹦跳跳,天天如此,有时弄个伤口出来也是常事。一旦受伤,特别是伤口较深的情况下,经过一段时间,会觉得伤口痒得难受。每当此时,大人就会说:“不要紧了,快好了。”而事实也确实如此,可伤口为什么要愈合了就会发痒呢? 原来,人的皮肤分为好多层,在表皮的最里面,有一层细胞叫生发层,这层细胞的生命力很强,能不间断地生长繁殖,表皮损伤的浅伤口,就是靠生发层长好的。但如果伤口很浅,神经受不到什么刺激,愈合过程 Children are naturally motivated, chasing chase, bouncing, every day, and sometimes getting a wound is also common. Once injured, especially in the case of deep wounds, after a period of time, will feel itchy wounds uncomfortable. Whenever this time, adults will say: “It does not matter, faster.” And the fact is true, but why heal wounds will itch? It turned out that the human skin is divided into many layers, in the epidermis Inside, there is a layer of cells called germinal layer, this layer of cells strong vitality, growth and reproduction can be continued, the shallow wounds of the epidermis damage, that is, by the growth of the hair layer is good. However, if the wound is very shallow, the nerve can not get any stimulation and healing process