Smoking teeth are usually yellow. The yellowing of teeth from smoking is usually due to cigarette stains, which are usually formed because cigarettes contain ingredients such as caffeine. This ingredient can react inside the body’s acidic mouth to form stains. Smoking for a long period of time can lead to yellowing of the teeth. If you smoke for a long time, the deposited stains will not be removed by brushing and cleaning the exterior of your teeth. If your teeth are not very yellow, you can use a whitening toothpaste or a toothpaste that removes tobacco stains. In the case of more smoke stains, teeth cleaning or whitening work, such as ultrasonic teeth cleaning surgery, can be done to improve the situation of yellow teeth. Usually need to do a good job of oral care, diligent brushing and rinsing, quit smoking, can alleviate the symptoms of yellowing teeth. However, for the sake of health, it is generally recommended to quit smoking.