If children have mild tooth decay, they can consume chewing gum appropriately, but care should be taken to choose the sugar-free type. Chewing gum can stimulate saliva secretion, promote saliva flow in the mouth and eliminate food residues, so it is beneficial to protect teeth. Although children can chew gum appropriately. However, attention should be paid to the selection of the type of chewing gum. Chewing gum is usually divided into sugar-containing type and sugar-free type. Sugar-containing chewing gum usually uses sucrose as the sweetener, and sucrose can provide a good environment for bacteria to grow if it stays in the mouth for a long time. At the same time, the bacteria will also use the large amount of acidic substances decomposed by sucrose, which will corrode the tooth enamel and aggravate the tooth decay. Sugar-free chewing gum usually uses xylitol as the sweetener, so children can chew the gum to get the sweet feeling and not produce a lot of bacteria due to the fermentation and decomposition of sugar, which can indirectly protect their teeth.