Children vomiting fever may be acute gastroenteritis, acute appendicitis, central nervous system infection and other reasons. 1. Acute gastroenteritis: children eat unclean food, not wash hands properly before eating, eat cold food, licking fingers and other factors lead to bacteria, viruses and other pathogens into the gastrointestinal tract, causing acute gastroenteritis, so vomiting fever. 2. Acute appendicitis: children with appendicitis in the early stages of the condition is not yet serious, there will be a loss of appetite, nausea, vomiting and other gastrointestinal symptoms, and later inflammation further development of pain in the lower right abdomen, fever, fatigue and other symptoms. 3. Central nervous system infection: bacteria, viruses and other pathogenic microorganisms do not directly infect the gastrointestinal tract, but the infection of the central nervous system leads to encephalitis, meningitis, inflammatory substances seepage leads to increased intracranial pressure and fever and vomiting. Children vomiting fever may also have other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.