Sunbathing has many benefits for the human body, mainly promoting bone growth, preventing bone and joint diseases, enhancing skin resistance, and strengthening metabolism. 1. Promote bone growth: the ultraviolet rays in sunlight can make the skin synthesize vitamin D, which is then conducive to the absorption of calcium and phosphorus, and can promote the growth of children’s bones and prevent osteoporosis in the elderly. 2. Prevent bone and joint diseases: In addition to preventing osteoporosis in the elderly and reducing degenerative changes in bone and joints, it also has a certain therapeutic effect on rheumatoid arthritis and rheumatoid arthritis. 3. Enhance skin resistance: sunbathing can kill germs on the skin, enhance skin and body resistance, and prevent skin diseases. 4. Enhance metabolism: sunbathing can promote blood circulation and enhance human metabolism. Sunbathing has many benefits for the human body, but excessive sunbathing, ultraviolet rays will accelerate skin aging, while increasing the risk of skin cancer, sunbathing should be moderate, to avoid prolonged or strong light exposure.