An extrinsic tooth stain is a stain that appears on the surface of a tooth. Tobacco usage or regular consumption of beverages such as coffee, tea, wine, or soda are the most common causes. A colored residue from tobacco, meals, or drinks collects in the protein layer that covers tooth enamel, causing the stain. Fortunately, extrinsic tooth stains do not penetrate the tooth enamel and can be removed with regular dental cleanings, whitening toothpaste, and at-home teeth whitening solutions. Learn more in our blog article, "Stained Teeth & Types of Tooth Discoloration."