When a baby has a fever, the phenomenon of a white tongue, also called a white tongue, is caused by the child’s digestive dysfunction. During a fever, the gastrointestinal tract will be disrupted and digestion will be weakened, and the secretion of digestive enzymes will be reduced by the fever, making it easy for indigestion to occur, thus leading to the phenomenon of a white tongue. If the temperature exceeds 38.5 degrees, oral antipyretic drugs such as ibuprofen suspension are needed to reduce fever. In addition, it is also necessary to find the cause of the fever and treat the cause. During fever, it is recommended to give the child a simple, light and easy to digest diet. It is not recommended to give the child meat or eggs that are difficult to digest, or cold fruits, and it is better to drink some rice porridge or millet porridge for treatment.