Children’s teeth with yellow spots are mostly considered to be caused by dental plaque, poor diet, dental caries, dental fluorosis, tetracycline teeth, etc., which can be improved by scaling, regulating diet, and smoothing the edges of the chipped edges of the turning needle adjustment. 1. Accumulation of dental plaque: you can remove stains, yellow stains and dental plaque on the teeth through ultrasonic scaling, eliminate dental calculus, improve the symptoms of yellowing of children’s teeth, and usually do a good job of oral cleaning, including proper brushing and flossing. 2. poor diet: eat less food that is too sticky, strengthen oral hygiene and cleanliness, and brush and rinse your teeth in time after meals. 3. Dental caries: If the patient’s milk teeth are carious and the teeth appear yellowish, you can choose the smooth turning needle to adjust and grind the edge of the defect, and at the same time, apply the medication containing fluorine to improve the acid-resistant ability of the tooth enamel, to avoid the further development of dental caries. 4. Dental fluorosis, tetracycline: dental fluorosis and tetracycline can also lead to yellow plaque on the surface of the teeth, seriously affecting the aesthetics, you can consider the use of veneer repair to cover. There may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.