Stagnant food is a condition in Chinese medicine, mainly referring to the gastrointestinal disorders formed when children eat too much milk and damage the spleen and stomach, causing milk food to stagnate in the middle jiao. The disease mostly occurs in infants and young children. Fever due to food accumulation is a special critical condition in which the child’s body feels hot due to food accumulation, but the body temperature is not high when measured. The main clinical manifestations of food retention fever are abdominal fullness, dry or sour stools, foul gas, sour belching, and abdominal distention and heat. In a few children, the immunity of the body may be reduced due to food accumulation, and the internal environment may be disturbed to induce infection, resulting in fever and corresponding symptoms at different infection sites. Fever in children with food retention usually occurs at night. If the child’s body temperature is also significantly elevated, it usually indicates that the child has an infection. In this case, the child should go to the hospital for routine blood and inflammation index examination to determine the pathogen and then treat accordingly, and pay attention to the appropriate use of Chinese medicine The child’s gastrointestinal tract should be conditioned to promote the repair of the digestive function of the gastrointestinal tract. In conclusion, fever due to food accumulation should be treated promptly to avoid fever due to untimely treatment or even fever due to infection.