Infusion for acute gastroenteritis usually takes 3~5 days, if the baby’s symptoms are more serious, the infusion time may be extended, the specific situation varies from person to person. Acute gastroenteritis in babies is often caused by improper eating, upper respiratory tract infections and other triggers. Acute gastroenteritis in babies is often preceded by triggers such as improper eating and upper respiratory tract infections, which may be caused by viral or bacterial infections. If the baby is clearly bacterial infection, or obvious dry mouth, urine, weakness and other symptoms of dehydration, intravenous anti-infective or rehydration therapy, usually need 3 to 5 days baby symptoms to significantly relieve, but the specific circumstances vary from person to person. If the baby’s acute gastroenteritis infusion more than 5 days symptoms have not improved, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to determine the cause of the disease, for treatment.