Fever and vomiting in children may be related to acute upper respiratory tract infection, acute enteritis and viral pneumonia. 1. Acute upper respiratory tract infection: commonly known as a cold, may be due to viruses, bacteria and other infections that multiply in the body to release toxins. It causes the body to develop fever as well as systemic symptoms, such as vomiting and diarrhea. 2. Acute enteritis: mostly due to bacterial or viral infections, pathogens multiply in the intestinal tract, causing fever, vomiting, usually accompanied by varying degrees of diarrhea. 3. Viral Pneumonia: Commonly adenovirus, etc., causing inflammation of lung tissues, leading to increased secretion, cough, fever and other symptoms. It also affects the gastrointestinal tract with symptoms such as vomiting and diarrhea. There are other causes of fever and vomiting in children, so it is recommended to consult a doctor and follow the doctor’s instructions to carry out the relevant examinations, to clarify the cause with the help of the doctor, and to carry out targeted treatment or therapy.