Tooth discoloration presents an obvious cosmetic issue. However, there are often issues underlying the color change that present a greater cause for concern. The appearance of white areas on the tooth may indicate the presence of a composite filling that has become recently exposed due to color chances in the natural tooth structure. In other circumstances, the discoloration may indicate tooth demineralization as a precursor to cavity formation. In either case, it is paramount that the root cause be identified to prevent any serious harm to the tooth.