Do not panic if your child has a sudden fever. Calmly analyze the cause of the fever, provide physical cooling or symptomatic medication and seek medical attention if necessary. In many cases, fever is not a serious problem and needs to be treated differently. Some children’s fevers are not caused by disease and do not require special treatment or excessive worry. Some children may have fever after vaccination, but the temperature is generally not high and will subside soon on its own, without other accompanying symptoms. The fever can be reduced within 2-3 days. Children may also have a fever when they are exercising relatively heavily or when the ambient temperature is relatively high, generally low to moderate fever, let the baby rest more, drink appropriate water, reduce the ambient temperature, generally can also restore the normal body temperature. Some children have fever due to various diseases, if the body temperature does not exceed 38.5 ℃, you can use physical cooling methods to deal with. Generally do not cover the child too tightly and wear too many clothes. Give the child a warm bath, wipe the area where the arterial pulsation is obvious, such as the neck, with a warm towel can also help reduce the fever, and actively measure the temperature. If a child has a fever and is tired, does not feel like eating, or has a cough and phlegm, abdominal pain and diarrhea, or if the fever persists without remission, it may be due to the disease itself, accompanied by fever, which needs to be diagnosed in a timely manner at the hospital so that the doctor can help solve the problem and the temperature can return to normal after effective treatment. Some children with fever can lead to febrile convulsions, which is something that needs to be seen in a timely manner to avoid the onset of the disease, which can cause abnormal life-threatening conditions. Fever is a common problem in children, and it is important to take corresponding measures according to different situations.