The thick white tongue of an eight-year-old child is usually associated with food accumulation, mostly accompanied by loss of appetite, anorexia, bloating, bad breath, heat in the heart of the hands and feet, yellow face and other symptoms. Parents should ensure that their children eat regularly, prohibit binge drinking and overeating, give them more vegetables, fruits in moderation, let them drink more warm water, do not drink drinks and cold water, eat less fatty, sweet, greasy and cold food, because the spleen and stomach cold will also produce the phenomenon of thick white tongue coating. You can eat foods that strengthen the spleen, such as yam, gravy, poria, lentils, etc. to strengthen the spleen and stomach. Parents are advised to take their children to outdoor activities, which can enhance the spleen and stomach function and promote digestion, as well as strengthen physical fitness.