γγOne course of photorejuvenation can completely get rid of freckles, age spots and discoloration. The principle of removal: using the principle of light selective absorption, with multiple spectral lines, acting together in the deep layer of the skin, is selected and absorbed by various pigment cells in the tissue, without destroying the normal tissue cells, so that the various pigment cells are destroyed and decomposed, and the strong pulse light breaks up the pigment mass, part of which is swallowed by the macrophages in the body, and part of which is shed out of the body, so as to get rid of freckles, age spots and discoloration. This is a very mature technology.γγ”Skin rejuvenation is most commonly used to treat skin blemishes and skin aging caused by ageing and ultraviolet radiation from the sun. Skin aging is mainly concentrated on the skin of people’s face, neck, hands and chest, which are often exposed to sunlight, and is mostly characterized by skin laxity, lack of elasticity, roughness, wrinkles, dull color, various pigment spots, and facial flushing and rosacea caused by vasodilatation, starting around 25-30 years old. The technology.