Yellow teeth are mainly caused by surface staining of the teeth, some of which are caused by wear and tear of the enamel resulting in the exposure of yellow dentin, plaque, and calculus. You can whiten your teeth by cleaning, seeking the help of a doctor and making your own whitening toothpaste. Cleaning of the teeth plays an irreplaceable role in improving the problem of yellow teeth. A better cleaning of the mouth can effectively remove some food debris from the teeth and avoid the formation of some plaque that can lead to enamel damage. Also, the mechanical action of brushing can help remove some other colored substances due to bacterial fermentation. Dentists use scaling to help remove plaque, calculus, etc. from the teeth. There are also many other ways that a dentist can deal with this problem. Some yellowing or browning of the teeth may be caused by tartar, which can only be effectively removed by deep dental cleaning and scraping. It is important to note that more severe yellowing of teeth caused by enamel hypoplasia can be treated by considering cold light whitening or porcelain veneers. Yellowing teeth are generally not a difficult problem to deal with. However, it is still important to pay attention to some good habits and try to have good oral hygiene in daily life.