The child’s fever and vomiting stomach pain may be caused by acute gastroenteritis, encephalitis and so on. 1. Acute gastroenteritis: because the child’s gastrointestinal function is not yet well developed, if the diet is not appropriate or eat food containing bacteria or viruses, it will be easy to induce acute gastroenteritis, in the stimulation of inflammation, there may be a fever want to vomit stomach ache, accompanied by nausea, diarrhea and other symptoms. 2. Encephalitis: when the child’s central nervous system is infected, it may lead to encephalitis and other diseases, often manifested in the early stage of poor mental state, and may appear persistent high fever, nausea, jet-like vomiting and other symptoms. The child’s fever and want to vomit stomach pain may also have other reasons, 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.