Small white spots on teeth may be caused by diseases such as cavities, dental fluorosis and enamel hypoplasia. 1. Cavities: Dental caries is a kind of chronic progressive lesion formed after long-term action on the teeth with bacteria as the main factor and plaque as the starting factor. The early development of caries can lead to partial calcification of the tooth surface and the appearance of white spots, which are the precursor of cavities. 2. Dental fluorosis: This is due to the fact that during the eruption period of permanent teeth (usually before the age of 7), people live in highly fluoridated environments, such as Hebei, Inner Mongolia and Shanxi. The water in these places contains a lot of fluoride, which can lead to the quality of the teeth, especially the development of enamel and dentin, and can lead to white spots on the teeth. 3. Inadequate development of tooth enamel: Calcium deficiency, heredity and other factors can lead to inadequate development of tooth enamel, which will lead to the formation of white spots. If the symptoms of small white spots on the teeth, persistent and unrelieved, you need to consult a doctor in time to reduce the adverse effects of the disease through “early detection, early diagnosis, early treatment”.