Children with low-grade fever usually have a temperature between 37.4 and 38.5℃, which is often caused by pathogenic infections, and can be treated by physical cooling, fluid and energy supplementation. 1. Physical cooling: If the child’s fever is lower than 38.5 ℃, it is called low fever, low fever usually do not need to apply antipyretic drugs, but parents can use warm water to wipe the child’s forehead, armpits, thighs and other places, or use antipyretic patches and other ways to lower the child’s temperature. 2. Replenish fluids: During the cooling process, the child may sweat a lot, so it is necessary to replenish fluids in a timely manner to avoid dehydration caused by profuse sweating. 3. Supplemental energy: Because of the fever, the child’s energy is consumed, parents also need to supplement the child’s energy, you can eat some high energy, easy to digest food, to ensure sufficient energy supply. If the child’s fever persists, or is accompanied by other symptoms, parents should go to the hospital in time to clarify the cause of the fever, and early formal treatment.