In children with fever, the performance varies depending on the stage of the fever. Usually, there is fatigue, poor appetite, emotional irritability, etc. Some children may also develop a rash. In general, most children have no symptoms in the early stages of fever. If the fever lasts for a certain period of time, they may experience general discomfort, such as more agitated or depressed mood, lack of energy, fatigue, and feeding difficulties. Some children may also develop a low fever and rash, and a few children may also experience changes in the oral mucosa. When the body temperature gradually rises, the child may appear flushed, cold and moist limbs, pale and bloodless skin, no sweating, and if the temperature reaches 40 degrees, there may be coma and convulsions. If the fever reaches its peak, it is slow to cool down, and the child usually shows red hot skin, sweating, or rapid breathing. In short, the symptoms of fever in children need to be taken seriously by parents, so that they can take timely cooling measures to avoid serious development of the disease and affect the future healthy growth of the child.