Age is relentless, and even the most capable people cannot resist the traces left behind by age. As we grow older, not only the physical condition declines year by year, but also the function of various organs in the body declines, and with it, the appearance of age spots. Age spots, medically known as seborrheic keratosis, is a very common benign skin tumor that is more common in the elderly, but may also appear in people after the age of 30. There are many factors for the formation of age spots, which are related to the following factors: a. Age, after 25 years old, the metabolic function of the body starts to decline. If you don’t pay attention to your diet structure and always like to eat things with high sugar and high fat, there will be especially tiny brown particles (lipofuscin) produced due to lipid peroxidation. With the weakened metabolic function of body cells, these pigment substances cannot be discharged out of the body, plus the formation of new cells is slower, and then the age spots slowly appear. Second, the lack of antioxidants, antioxidants and free radicals in the body is a dynamic balance. However, as we get older, the number of antioxidant substances, such as peroxide dismutase, will not only be reduced, but also the activity will be lowered, which means that the free radicals in the body are in excess. Third, excessive sun exposure, age spots are more on the face and hands, which are related to sunlight. The ultraviolet rays in the sun will cause damage to the epidermis and dermis of the skin, causing the collagen fibers that maintain the elasticity of the skin to break, resulting in dehydration and thinning of the skin, especially prone to wrinkles and age spots. Fourth, age spots may also be caused by many factors, such as genetic factors, lack of nutrients, etc. Since the causes of age spots are clear, to prevent age spots, we need to do the following: 1. pay attention to sun protection: avoid excessive exposure of exposed parts of the body to ultraviolet rays; 2. eat a reasonable diet: eat more vegetables, fruits and foods with high vitamin C content; 3. exercise: speed up the body’s metabolism and promote the excretion of oil and sweat secreted on the surface of the skin; 4. pay attention to cleanliness: take a bath regularly to help reduce the formation of age spots. It is conducive to reducing the formation of age spots.