The diarrhea once eaten want to vomit and fever consider may be acute gastroenteritis, food poisoning, inflammatory bowel disease and other disease factors; need to be under the guidance of the doctor for targeted treatment, such as drug therapy, surgical treatment. 1. Acute gastroenteritis: fever, nausea, vomiting, diarrhea and other symptoms can be accompanied by infection; combined with bacterial infections need to take ciprofloxacin and other antibiotics as prescribed by the doctor; metoclopramide can be used to stop vomiting when the vomiting symptoms are more severe; need to be rehydrated when accompanied by dehydration symptoms. 2. Food poisoning: vomiting, diarrhea, fever and other symptoms can occur after eating food containing toxic substances; if it is eating toxic chemicals, such as pesticides, heavy metals, etc. need to carry out gastric lavage, emetic treatment, accompanied by symptoms of dehydration need to be rehydrated, bacterial food poisoning can be used to amoxicillin and other antibiotics, diarrhea can be used to stop the diarrhea of the serious montelukast. 3. Inflammatory bowel disease: acute stage may have diarrhea, abdominal pain, fever symptoms; can be used to control the mild to moderate activity of the inflammatory bowel disease of Liuzosulfapyridine, can also be used to prednisone and other glucocorticosteroid therapy; accompanied by perforation, hemorrhage and other conditions need to be considered for surgical treatment. It is recommended to go to the hospital when there is diarrhea and want to vomit when eating and fever, please ask the doctor to make a judgment and give the treatment plan.