在日常生活和劳作中,皮肤的擦伤、划伤、割伤等,是最常见的小外伤。如果伤口消毒、包扎、护理得好,一般就不会留下痕迹。然而,有些本来可以不留痕迹的小损伤,愈后却出现了难看的色素沉着斑或形成难以消除的疤痕,以致不同程度地影响了容貌。出现这种现象,一个最主要的原因,就是 In daily life and work, the skin abrasions, scratches, cuts and so on, is the most common small trauma. If the wound disinfection, dressing, care well, generally will not leave traces. However, some small lesions that could have left no trace later developed ugly pigmentation spots or formed hard-to-remove scars that affected their appearance to varying degrees. One of the most important reasons for this phenomenon is