The causes of facial aging are considered to be the skin itself, external factors, bad habits and improper facial care, as follows: 1. Skin itself: As we age, the loss of collagen in the facial skin increases, so the skin becomes thinner gradually, and the elastic fibers of the skin break, resulting in a decrease in skin elasticity. The sebaceous glands and sweat glands secrete less oil and sweat, and the moisture of the skin gradually decreases.2. External factors: External factors can also cause facial aging, such as long-term ultraviolet radiation, which causes a large number of melanin granule deposits or pigment-like dermatitis in the skin. Due to the role of gravity caused by the skin sagging, resulting in a large number of wrinkles in the skin. 3, bad habits: in life, if you stay up late for a long time, sleep is not enough, will look dull skin, accelerating skin aging. Also in the diet long-term intake of spicy and stimulating food, long-term alcohol consumption will also lead to facial aging. 4, improper facial care: if improper care, long-term application of cosmetics or drugs containing hormones, will also accelerate skin aging. 5, other: if it is a poor urinary and fecal flow, long-term constipation patients, you can also find a lot of facial dullness, and skin lusterless.