Children with thick white tongue and bad breath may be caused by poor oral hygiene, food accumulation or other diseases, and should be treated accordingly according to the specific cause. If there is only white tongue and bad breath, but no other discomfort symptoms, it is generally believed that poor oral hygiene is the cause. In this case, you can help your child clean the mouth with water and brush the tongue with a toothbrush, no special treatment is needed. If a child has a thick white tongue and bad breath, but also has a poor appetite and dry stools, it may be due to overeating that damages the spleen and stomach, resulting in food accumulation. Long-term accumulation of food can cause malnutrition in children. It is recommended to maintain a light diet and eat foods that are good for the spleen and eliminate food and stagnation, such as hawthorn and hawthorn products, hen’s nest and lycopodium, etc., to help the body recover. In addition, we should eat more fresh fruits and vegetables, pay attention to nutrition, do not eat too much, and strengthen exercise to avoid accumulation of food. It should be noted that if children suffer from asthma, bronchial dilation, sinusitis, purulent tonsillitis and other diseases, it is easy to cause open-mouth breathing, causing thickening of the tongue, white, accompanied by oral odor, as well as shortness of breath, cough, nasal congestion, cough, breathing difficulties and other discomforts. In this case, you need to go to the hospital in time to get a clear diagnosis and then treat the original disease.