There are many causes of fever and vomiting in children, and treatment usually includes conservative treatment, medication, and intravenous fluids. Fever and vomiting in children are most likely related to bacterial viral infections, like gastroenteritis, upper respiratory tract infections, hand, foot and mouth disease, norovirus infections, appendicitis and encephalitis. If it is a bacterial infection, it is necessary to consult a doctor in time to choose antibiotic treatment accurately under the guidance of the doctor. If it is a viral infection, you can take some antiviral drugs and symptomatic treatment under the guidance of the doctor. If the fever and vomiting are more serious, we should consult a doctor in time and give the child antipyretic and antiemetic drugs as prescribed by the doctor, and at the same time, we should supplement the oral rehydration night in order to prevent the child from vomiting and sweating caused by dehydration and electrolyte disorders, and if it is difficult to take oral rehydration night, we should supplement the fluids in time. If the encephalitis is considered to be caused by, need to actively rescue, will be life-threatening. Generally speaking, if the fever is only low, and there is a slight vomiting, the mental condition is good, consider the possibility of general infection, you can choose a conservative way of treatment, drink more water, expel toxins from the body, to light diet. If the fever is high, accompanied by frequent vomiting, or mental health is not good, we should go to the hospital for examination, according to the doctor’s diagnosis of the results of taking medication, and in serious cases, to be injected intravenously. There are many reasons why children have fever and vomiting, parents should not blindly treatment, must timely medical treatment, symptomatic treatment, to avoid delaying the condition.