Fever and vomiting in children may be caused by acute gastroenteritis, acute appendicitis, acute intussusception, upper respiratory tract infection, or encephalitis. Parents should take their children to the hospital in time to determine the cause and treat the cause. Common causes and treatments 1, acute gastroenteritis: children with unclean diet or overeating lead to acute gastroenteritis, fever with vomiting symptoms. In this case, oral haloperidol and flavopiridol tablets can be taken under the guidance of a doctor. In addition, patients are prone to dehydration symptoms, should be timely rehydration, you can drink warm saline or sugar saline, such as serious symptoms can be timely infusion; 2, acute appendicitis: children in addition to the right lower abdominal rebound pain, but also with frequent vomiting, fever symptoms, need to seek medical attention, early symptoms of mild antibiotics anti-infective treatment, such as ampicillin, metronidazole and other drugs. Severe symptoms such as combined peritonitis, gastrointestinal perforation, if necessary, surgery; 3, acute intussusception: children often show frequent vomiting, with the development of the disease will have fever, solve jam-like blood stool and other symptoms. General pediatric intussusception is mostly primary, can apply air or barium enema method to reset. If the enema method can not be reset or suspected of intestinal necrosis, secondary intussusception feasible surgery; 4, upper respiratory tract infection: children with colds, may also appear fever with vomiting symptoms. At this time, under the guidance of the doctor, the application of Pudilan anti-inflammatory oral liquid, Shuanghuanglian oral liquid, Banlangen punch, pediatric Aminophenol Huangamin granules and other drugs for treatment; 5, encephalitis: children with encephalitis, often with fever, vomiting, can be accompanied by headache, poor mental symptoms, abnormal neurological examination. Choose the appropriate treatment according to the cause, such as viral infection encephalitis choose acyclovir tablets, cerebral edema is more obvious, you can follow medical advice to use mannitol. During the treatment period, parents should ensure that the child has a light diet, mainly liquid or semi-liquid, such as millet porridge, egg soup, etc. Avoid greasy food.