White spots on the teeth usually have the following conditions: 1, mild dental fluorosis: manifested as tooth enamel with chalky to brown plaque, the surface of some or all of the loss of luster, visible opaque cloudy or rough, like chalk-like lines, spots, plaques, or the entire tooth surface was white chalk-like changes; 2, enamel demineralization: usually manifested as the tooth surface or part of the teeth close to the gingival margin, the tooth surface occurs with poorer transparency, the Chalky changes occur, belonging to the manifestation of enamel demineralization. Due to the poor oral hygiene of patients lead to food accumulation, acid erosion of tooth enamel under the action of bacteria that is manifested as enamel demineralization; 3, enamel dysplasia: that is, enamel cell metabolism abnormalities in the enamel development process caused by enamel formation obstacles, the formation of enamel development defects and other diseases. Usually manifested as changes in tooth surface color, can be chalky or brown, tooth surface can have shallow grooves, fossa-like depression or banded transverse lines. However, the specific conditions need to go to the hospital to find a dentist to confirm the diagnosis.