Patients with nausea, vomiting and fever are considered to have acute gastroenteritis. Clinically, for the symptoms of acute gastroenteritis, anti-infective drugs inside and outside the stomach and intestines, gastrointestinal mucosal protectants, microecological preparations, etc. are given. In case of bacterial infection, antibacterial and anti-inflammatory drugs such as flavopiridol and haloperidol can be used, and montelukast is given to protect the gastrointestinal mucosa. At the same time, micro-ecological preparations such as Jin Shuangqi and Rectify can be given to regulate the intestinal flora and inhibit the growth of harmful bacteria in the intestine to stop diarrhea. If abdominal pain is severe, atropine, scopolamine, belladonna tablets, etc. can be given to relieve the symptoms. Patients are advised to rest in bed, avoid the intake of spicy and stimulating food, give light, warm and soft, easily digestible food, and eat less and more meals. If the patient has severe symptoms, dehydration and electrolyte disorders, give oral rehydration salts or intravenous fluids to supplement.