Children’s fever subside time should be based on different causes to make the appropriate inference, most of the children’s fever to viral infections are more common, in addition to fever in addition to the mental state is good, generally given fever symptomatic treatment does not require special treatment, most of the fever will be about three days. If in addition to fever, poor mental state, high fever persists and accompanied by obvious abdominal pain, vomiting and other symptoms, we should pay attention to the possible existence of acute appendicitis, this kind of disease only through the early antibiotic active anti-inflammatory conservative treatment or surgical treatment to eradicate the lesion after the fever can subside. In case of purulent tonsillitis caused by bacterial infection, antibiotic treatment is needed, so it is better to go to the hospital for preliminary etiological judgment.