Vomiting well instead of starting a fever may be acute gastroenteritis, acute appendicitis and other diseases caused by co-infection, the patient can be treated by the use of norfloxacin and other drugs or surgery and other methods. 1. Acute gastroenteritis: this is an acute inflammatory disease of the mucous membrane of the gastrointestinal tract, the patient can be manifested as vomiting, diarrhea, fever and other symptoms, such as this cause of the patient’s fever after vomiting, at this time you can carry out anti-infective, rehydration and other medications, commonly used norfloxacin, loperamide, oral rehydration salts and so on. 2. Acute appendicitis: mostly due to bacterial invasion of the narrowed appendiceal lumen, patients can show early anorexia, nausea, vomiting, typical symptoms of metastatic right lower abdominal pain, can be accompanied by fever, such as this cause of the patient vomiting fever, the need for surgical treatment. If you have vomiting well after fever manifestation, you should consult a doctor as soon as possible to clarify the cause of the disease, timely individualized treatment, so as not to delay the condition leading to adverse consequences.