Most children with fever have hot foreheads and trunks and extremities when they have a low to moderate fever, and have poor peripheral circulation when they have a high fever, i.e., greater than 39°C. The temperature of the forehead and trunk is higher, while the periphery of the hands and feet is cooler. Most fevers in children are caused by viral infections. If the child is in good spirits in addition to fever, symptomatic treatment is usually given to reduce fever without special application of other drugs, so the child’s temperature should be measured immediately. If the body temperature is greater than 38.5 ℃, you can apply antipyretic drugs, when the body temperature is lower than 38.5 ℃, pay attention to the amount of water and rest can be, do not need to lower the body temperature too low, in the disease to maintain a certain body temperature is conducive to recovery and shorten the course of the disease.