The causes of vomiting and fever are complex. It is usually caused by gastrointestinal diseases, such as acute gastroenteritis can cause vomiting and diarrhea and accompanied by an increase in body temperature 6-year-old children vomiting and fever, if there is a headache, fever and accompanied by jet vomiting, brain lesions should be considered, such as the common meningitis, fever, vomiting and diarrhea in summer, should be considered dysentery bacillus, Escherichia coli infection. Poor eating habits, overeating, eating more meat foods or sweets, which in turn affects the digestive function, can lead to bloating, abdominal pain, constipation, yellow tongue and low appetite. In addition, if a child has a cold and fever and a persistent fever, it can also lead to damage to the spleen and stomach functions, affecting the digestive function and causing symptoms of vomiting. Acute gastroenteritis can cause symptoms such as vomiting, fever, and dehydration, which may be accompanied by diarrhea, weakness, and even electrolyte disorders. When your child has vomiting and fever, it is best to go to the pediatrician of the hospital for a detailed examination to clarify the specific cause and then do targeted treatment, or you can combine the patient’s other symptoms to make a comprehensive judgment and choose the right treatment. You should pay attention to give your child more warm water, keep the diet light and digestible, do not overeat, do not give your child too much meat and greasy stimulating food.