Small white spots on the teeth are enamel demineralization, which means that minerals such as calcium and phosphorus are shed from the enamel. It may be caused by tooth enamel hypoplasia, dental fluorosis, and dental caries. 1. Dental enamel hypoplasia is a common disease of abnormal tooth structure. It is generally an abnormality of tooth enamel structure caused by severe nutritional disorders, endocrine disorders, severe apical periodontitis and other infections of the milk teeth during development. 2. Dental fluorosis is generally the result of high fluoride intake in the body, causing defects in the enamel during development, resulting in the formation of white spots. 3. Dental caries is the production of acid by bacteria, leading to demineralization of the teeth. Small white spots on the teeth may also have other pathological factors, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.