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在日常生活中,由于不小心磕破点皮或者擦伤、划伤、切伤、割伤等是常有的事。一般说来,只要伤口不发生感染,大约3～4天后,局部就会出现一层薄薄的红褐色痂。痂逐渐增厚变硬,7～10天左右,硬痂自行脱落,新生的嫩红色皮肤便显露出来。如果身体某个部位接受激光美容、液氮冷冻治疗,也会出现这样的痂。这种人体修复创面的基本自然过程,能使受损之处基本完好如初。然而遗憾的是,在痂皮生长的过程中,由于局部发痒,有的人就自觉或不自觉地用手去抠、揭或者蹭掉,这样,有些本来不会留下疤痕的小创伤,愈后却出现了色素沉着或者形成疤痕,不同程度地影响了美容,严重者还会造成终身遗憾。那么,为什么皮肤受伤处的痂皮不能提前抠、揭呢?原来皮肤受到损伤后,局部因受到刺激而使小血管扩张充血,浆液和白细胞从血
In everyday life, it is common to scratch, scratch, scratch, cut, and cut because of accidental knocking. In general, as long as the wound does not occur infection, about 3 to 4 days, the local will appear a thin red-brown scab. Crust gradually thicken and harden, about 7 to 10 days, hard scab off their own, newborn red skin will be revealed. If the body part of a laser beauty, liquid nitrogen cryotherapy, there will be such a scab. The basic natural process of the human body to repair the wound can make the damage basically intact. Unfortunately, during the growth of the crust, due to the local itching, some people consciously or unconsciously use their hands to dig, expose or rub off, so that some would have left little scar scars, However, there have been pigmentation or scar formation, affecting the beauty to varying degrees, in severe cases, will cause lifelong regret. So, why the scabs at the skin injury can not pull in advance, exposing it? The original skin after injury, due to stimulation of local and small blood vessels to dilate, congestion and leukocyte from the blood