Tooth decay in young children can be treated by fluoride application, caries filling or abrasion of decayed tissue. 1. Fluoride application: Tooth decay in young children can be treated by applying fluoride to the surface of the tooth, which can protect the dentin and is more suitable for shallow cavities. 2. Caries filling: If a toddler’s tooth decay has developed a substantial defect, the decayed tissue can be removed and then filled with a restored cavity through glass ionomer bonding. 3. Carious tissue grinding method: If a toddler’s tooth decay has a large range of cavities and the occlusal surface is peeling off, the perimeter of the decayed tooth of the toddler can be ground and the tip of the tooth can be ground off, thus preventing the cavity from continuing to expand, and at the same time, a metal crown can be used to make a temporary restoration. If a toddler has tooth decay, parents should take the toddler to the clinic in time, under the guidance of professional doctors, according to the actual situation to choose targeted treatment, to avoid aggravation of the condition.