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皮肤衰老是内源性因素(自然生理衰老)和外源性环境因素共同作用的结果。后者在某种程度上对某些部位皮肤衰老起着更为重要的作用。紫外线(ultraviolet,UV)是导致皮肤老化的最重要的外源性因素,皮肤光老化系指中、老年人长期暴露于日光部位皮肤的一种临床及组织学表现,又称皮肤
Skin aging is the result of a combination of endogenous factors (natural physiological aging) and exogenous environmental factors. The latter plays a more important role in the skin aging in some areas. Ultraviolet (UV) is the most important exogenous factor that causes skin aging. Skin photoaging refers to a clinical and histological manifestation of the long-term exposure of the elderly to the skin of the sun, also known as skin.