Small white spots have appeared on the teeth, indicating that the teeth have been demineralized, if it is caused by abnormal development of teeth, if the child has not yet finished replacing the teeth, you can take calcium supplements. If it is caused by dental caries, or the child has already finished changing teeth, then calcium supplementation has no therapeutic effect. 1. Tooth demineralization may be caused by abnormal tooth development. Severe calcium and phosphorus deficiencies can affect enamel cells’ secretion of enamel matrix and mineralization. If the child has not yet finished changing teeth, this time can be supplemented with calcium, in order not to affect the development of teeth afterward. 2. If the teeth have appeared small white spots are caused by dental caries, or the child has finished changing teeth, then this time the calcium supplement has no therapeutic effect. The appearance of small white spots on the teeth 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.