The sun has many benefits to the human body, specifically the following points: the first point, can prevent and treat skin diseases, more common is psoriasis, eczema, can be treated by receiving sun exposure. This is because the skin is properly exposed to ultraviolet light, which can kill the bacteria on the skin and enhance the resistance of the skin. The second point is that sunlight can enhance the immunity of the human body, which can enhance the resistance of the human body to viruses, germs and other pathogens, and increase the vitality of human phagocytes. The third point is that the sun can replenish calcium. Through the human body and sunlight contact, can form part of the vitamin D in the human body, this component can be conducive to the absorption of calcium in the body, especially conducive to the deposition of calcium on the bones, for the treatment and prevention of osteoporosis, fractures, have great benefits.