皮肤癌的发生率在过去对年来有所增加。紫外线照射在人皮肤癌发生中的作用已由流行病学调查确认，但其机制未完全阐明，目前认为其作用可能是双重的：一是紫外线照射可引起的细胞DNA的突变，这些基因的改变如不能被修复．最终将导致细胞无限制地生长和形成肿瘤。二是紫外线照射 The incidence of skin cancer has increased over the past few years. The role of ultraviolet irradiation in the development of human skin cancer has been confirmed by epidemiological investigations, but its mechanism is not fully elucidated. Currently, its role may be considered as twofold: First, mutations in cellular DNA caused by ultraviolet irradiation, changes in these genes If it cannot be repaired. Ultimately, it will lead to unlimited cell growth and tumor formation. The second is ultraviolet radiation