Extrinsic discoloration refers to the staining or discoloration of the outer surface of teeth caused by external factors. Common sources of this type of discoloration include foods, beverages, tobacco products, and poor oral hygiene. These stains typically affect the enamel, the outer layer of the teeth, and can vary in color from yellow to brown. Unlike intrinsic discoloration, which originates from within the tooth, extrinsic discoloration can often be removed through professional dental cleanings or at-home whitening treatments. Maintaining good oral hygiene practices, such as regular brushing and flossing, can help prevent the buildup of stains and keep teeth looking their best.