White spots on children’s teeth may be the result of the following situations:1. Lack of nutrition during tooth development or viral infection, resulting in matrix calcification, producing obstacles to the formation of chalky spots and plaques on the surface of the teeth, or even substantial defects.2. Excessive fluorine in the drinking water or soil in the area where the child lives, excessive fluorine jeopardizes enamel cells to produce dental fluorosis, presenting chalky or yellowish-brown plaques on the surface of enamel.3. Poor oral hygiene cleaning of the child, accumulation of large amounts of food debris and soft scale on the tooth surface can produce acid under the action of cariogenic bacteria, resulting in Chalky or yellowish-brown plaque on the surface of enamel.3. Poor oral hygiene and cleaning of children, a large amount of food debris and soft tartar accumulated on the surface of the teeth, etc., which can produce acid under the action of caries-causing bacteria, resulting in demineralization of dental tissues and chalky plaques on the surface of the teeth, or even produce cavities.