The main causes of skin aging are age, environmental factors, bad habits, chronic consumptive diseases and so on. 1. Age: with the growth of age, the body will gradually lack of collagen, resulting in the skin of the face and other parts of the body gradually become less elastic, loose, and even wrinkles, spots and other skin aging phenomena, which is a normal, natural physiological phenomenon that can not be avoided. 2. Environmental factors: for example, long-term exposure to ultraviolet radiation will lead to some of the skin collagen, water loss, damage to the stratum corneum, which in turn leads to skin aging, decreased elasticity. 3. Bad habits: such as frequent late nights, overwork, long-term smoking, can affect the regulation of skin cell activity, accelerating the aging of the skin. 4. Chronic consumptive diseases: for example, suffering from kidney disease, liver disease, etc., will lead to the body’s nutrition is slowly consumed, thus affecting the metabolism of the skin cells, so that the skin’s barrier function is weakened, resulting in skin aging. Skin aging can be caused by physiological factors and pathological factors, if the pathological factors lead to skin aging, it is recommended to consult a doctor in a timely manner, and follow the doctor’s instructions to standardize the treatment.