The most common cause of tooth stains is what we consume, as many of the things we eat and drink contain pigments that can discolor our teeth. For example, coffee, tea, and red wine are known to leave stains on our teeth due to their intense color pigments. Soft drinks and fruit juices are also culprits because they contain high levels of sugar and acid that can erode the enamel of our teeth, leading to discoloration. Similarly, certain foods, especially those that are high in sugar and artificial coloring, such as candy, chocolate, and other sugary snacks, can also cause tooth decay and discoloration. Foods that are high in acid, such as tomatoes, citrus fruits, and vinegar, can also be harmful to teeth by weakening the enamel. One of the other biggest culprits of tooth staining is tobacco use, as smoking and chewing tobacco contain tar and other chemicals that can discolor teeth and lead to tooth decay. Poor oral hygiene can also contribute to tooth stains because if you don't brush your teeth properly and regularly, plaque can accumulate on your teeth causing discoloration and cavities. Lastly, certain medications, such as antibiotics and antihistamines, as well as your genetics can cause your teeth to become discolored over time.