Children’s yellow teeth may be fluorosis, caries, periodontitis and other diseases, need to take general measures for the cause of the disease, medication, surgical treatment and other ways to whiten. 1. Dental fluorosis: can be manifested as tooth enamel coloring changes, namely, yellowish brown, dark brown and so on. Children can take composite resin restoration, also need bleaching treatment, under the guidance of the doctor in the teeth of the local use of bleaching gel. 2. Caries: In the early stage of the disease, white plaque or yellow-brown spots will appear on the surface of the child’s teeth. Parents should pay attention to not eat sugar before bedtime, rinse mouth and brush teeth after eating sugar, reduce the number of snacks, eat less sucrose and fructose, eat more vegetables and meat. Children need to apply fluoride such as 75% sodium fluoride glycerin paste and 8% tin fluoride solution under doctor’s guidance, and some children may need to apply silver ammonium fluoride as prescribed by the doctor. 3. Periodontitis: When there is a large amount of dark yellow calculus accumulation in the periodontal pockets, the teeth will not only be yellow, but also obvious bad breath. The child needs to cooperate with the doctor to take supragingival scaling and subgingival scraping to remove the tartar. If inflammation exists, antibiotic drugs such as doxycycline and amoxicillin need to be applied as prescribed by the doctor. There are many reasons for yellow teeth in children, so it is necessary to go to the hospital to identify the specific cause and actively treat the primary cause.