Dull skin can be caused by a variety of factors, such as irregular work and rest, skin inflammation or skin aging. 1. Irregular work and rest: Regularly staying up late and putting yourself in a state of fatigue or mental stress can lead to dull skin, and a face that looks like a vegetable. Therefore, it is important to develop healthy habits, as far as possible to do regular work and rest. 2. Inflammation of the skin: When inflammation of the skin occurs, the skin will be damaged, appearing rough skin, dull complexion and other phenomena. 3. Skin aging: with age, the moisture and oil in the skin will decrease, resulting in a dull and dark complexion. In addition to the above factors, long-term exposure to the sun and wind, the body’s melanin secretion disorders and other factors can also cause dull skin. If you have dull skin, you should go to the hospital in time, combine with the actual cause of the disease under the guidance of the doctor to carry out the relevant treatment and conditioning, and should not be handled indiscriminately, in order to avoid inducing adverse consequences.