Tooth discoloration is a common issue that can occur for various reasons. It can be categorized into three types: extrinsic, intrinsic, and age-related. Extrinsic discoloration happens when the outer layer of the tooth, called enamel, gets stained by food, drinks, or tobacco. Common culprits include coffee, tea, red wine, and smoking. Intrinsic discoloration occurs when the inner structure of the tooth, known as dentin, darkens or gets a yellow tint. This can be due to certain medications, tooth trauma, or excessive fluoride use. Age-related discoloration is a combination of both extrinsic and intrinsic factors. As we age, the enamel gets thinner, making the yellowish dentin more visible. Treatments for tooth discoloration vary depending on the cause. For extrinsic stains, over-the-counter whitening products like toothpaste, strips, or professional cleaning by a dentist can be effective. Intrinsic stains may require more advanced treatments such as in-office bleaching, veneers, or bonding. Preventing tooth discoloration involves good oral hygiene practices like brushing twice a day, flossing, and regular dental check-ups. Limiting the intake of staining foods and drinks, quitting smoking, and using a straw for beverages can also help. If you notice persistent discoloration, it's best to consult your dentist to rule out any underlying issues.