There are many reasons for the formation of wrinkles, and common factors include genetic factors, prolonged exposure to the sun, prolonged late-night work, smoking, etc. Those who have the above triggers are prone to wrinkles. 1. Genetic factors: the formation of wrinkles and genetic factors have a certain relationship, if there are related genes, it is easier to grow wrinkles. 2. Long-term exposure to the sun: long-term exposure to ultraviolet radiation will damage the skin collagen, resulting in dry skin, sebum secretion is too small, so that the surface of the skin becomes rough, the skin thickening wrinkles. 3. Long-term late night: long-term lack of sleep will destroy the skin elasticity of collagen, accelerate aging and produce wrinkles. 4. Smoking: cigarettes can slow down the generation of collagen, reduce skin elasticity and accelerate aging. At the same time as the mouth sucking action repeatedly will accelerate the mouth skin relaxation, resulting in wrinkles.