In general, vomiting and diarrhea with three days of diluted water is considered to be related to acute gastroenteritis, which can be relieved and treated by rehydration, oral montelukast and levofloxacin and other drugs. 1. Rehydration: vomiting diarrhea, diarrhea, dilute water for three days, if there is dehydration, you can take oral rehydration salts to replenish water and electrolytes, if necessary, can consult a doctor in a timely manner, to intravenous rehydration, to correct the water and electrolyte disorders. 2. Medication: (1) Antibiotics: if the diarrhea is caused by bacteria, levofloxacin, norfloxacin, azithromycin, cefixime, etc.; for diarrhea caused by parasites, drugs such as praziquantel can be chosen. (2) Antidiarrheal drugs: such as montelukast can adsorb intestinal toxins and protect intestinal mucosa; loperamide can inhibit intestinal peristalsis and relieve diarrhea symptoms. The above situation may also be related to other causes, it is recommended to consult a doctor in order to clarify the diagnosis and carry out targeted treatment. It should be noted that the above drugs should be taken under the guidance of a doctor and should not be used without authorization.