Children are growing vigorously, but their immune system is not yet fully developed. At the same time, because of their poor adaptability to the external environment, children are prone to fever when they are slightly unwell, or their body temperature rises rapidly after taking medicine to reduce fever. This is a process in which the body’s immune system and the outside world are repeatedly battling with each other. Especially in the hot summer, babies drink less water, do not adapt to the hot weather, etc. can cause repeated fever. Common causes of fever include respiratory and gastrointestinal infections caused by bacteria and viruses, resulting in fever. Suggested treatment: 1. Physical cooling is preferred for body temperature below 38.5℃ for intervention. For example, applying antipyretic patches, drinking more water, taking a warm bath or wiping the body can help reduce the body temperature. 2.Infants and children with body temperature above 38.5℃ need to be treated with medication and given antipyretic drugs such as ibuprofen. 3. A body temperature of 39℃ or higher needs to be treated with medication under the guidance of a doctor. Although fever occurs in children from time to time, it should not be taken lightly at any time because children’s diseases change quickly. If your child has a fever for more than three consecutive days without improvement or if your baby has a high fever or convulsions, seek medical attention in order to identify the cause and treat the symptoms.