1.What are the manifestations of skin photoaging? After the age of 30, our face began to appear a lot of problems, such as pigment abnormalities (age spots, sunlight black, etc.), skin roughness, laxity, fine wrinkles, enlarged pores, and skin microcirculation related to the expansion of the capillaries (facial redness), skin color dullness, lack of luster, and even a variety of benign and malignant tumors can also occur. These manifestations in our dermatology called photoaging (photoaging). 2, skin photoaging and what factors? Skin photoaging is a cumulative slow development process, the influence of a wide range of complex factors, different wavelengths of light, irradiation dose, physiological factors such as age, skin color, diet, lifestyle, pathological factors, occupational and environmental factors can affect the occurrence of photoaging. 3.How to prevent skin photoaging? General healthy lifestyle, follow skin biology for skin care, physical light protection, rational use of light-proof agents and appropriate drug intervention. 4.How to treat photoaging? Compared with the natural aging of the skin, the changes of photoaging such as wrinkles, skin roughness, and discoloration can be improved and reversed through a variety of measures such as medications and sunscreens, and prevention and treatment of photoaging is possible from a clinical point of view. These measures include sunscreen skin care products, antioxidants, retinoids and laser treatments.