White spots on teeth are not related to calcium deficiency and should be prevented from tooth decay. There are many main causes of white spots on teeth, including early stage of caries, which is usually seen in milk teeth. Early enamel caries, also called enamel demineralization, is mainly caused by acquired factors, such as long-term drinking carbonated drinks, fruit juice, eating sweets, etc., bacteria decompose the sugar produced by the acid attached to the teeth, so that the loss of minerals in the enamel, thus causing demineralization of enamel, and the surface of the teeth become chalky white, the formation of chalky plaque. Therefore, this condition should be prevented by preventing tooth decay, reducing or avoiding the intake of carbonated beverages and sugary substances, and doing a good job of dental hygiene to protect your teeth.