The enamel which reflects the natural color of your tooth can stain or dentin which is the inner surface of teeth stains and yellows the teeth. The causes of tooth discoloration are varied. Though many causes can be prevented yet there are some which are not in control. The causes of discoloration are:

• Consuming tea, coffee, wine, cola frequently
• Smoking cigarettes and chewing tobacco
• High intake of fluoride during childhood
• Damage of developing permanent teeth due to accident or trauma
• Aging can also contribute to staining of teeth as with age the enamel gets thinner exposing the dentin below. With age, the dentin come in contact with certain food and beverage and can stain your teeth
• Certain medical treatments can also contribute to staining of teeth