The common diseases of children’s black teeth include children’s caries, tetracycline teeth, pigmentation, etc. The treatments include medication, restorative treatment, and decoloration treatment. 1. Children’s caries: such as remineralization treatment, commonly used drugs include silver fluoride ammonia solution, fluorine protection varnish, sodium fluoride solution, etc. Restorative treatments include filling restoration (removal of decay, cavity preparation, cavity cushioning), inlay restoration (metal inlays and composite resin inlays), and preformed crown restoration (e.g., restoration of extensively decayed deciduous teeth). 2. Tetracycline teeth: pale yellow when they first erupt, with the continuous progress, the color of the teeth gradually become gray, brown or even gray-black. For light and moderate tetracycline teeth, the decolorization method is feasible. For severe tetracycline teeth, composite resin can be used to cover the surface of the teeth or veneer method (covered with composite resin, carved and shaped, and then polished after light curing), and crown restoration is also feasible for those with severe condition. 3. Pigmentation: Consumption of food with color, resulting in pigmentation, such as eating chocolate or iron-containing drugs. It is recommended to clean the mouth every day. For black deposits that are difficult to remove, they can be handled by teeth cleaning. If the above symptoms occur, it is recommended to go to the hospital stomatology department in time for regular treatment under the doctor’s guidance. The above medications should be applied under doctor’s guidance, avoid self-medication.