Tooth discoloration refers to the change in color of teeth, which can occur for various reasons. Factors such as aging, poor dental hygiene, and consumption of certain foods and beverages, like coffee or red wine, can lead to stains. Additionally, tobacco use and certain medications can also contribute to the yellowing or darkening of teeth. There are two main types of tooth discoloration: intrinsic and extrinsic. Intrinsic discoloration happens within the tooth structure, often due to genetics or trauma, while extrinsic discoloration is caused by external factors, such as staining from food or smoking. Regular dental care can help prevent and manage discoloration.