After oral rotavirus vaccine diarrhea if mild can not take medication, usually about three days to relieve themselves, drink more water to replenish fluids. If the diarrhea is severe, it is necessary to take medicines such as montelukast and lactobacillin tablets under the guidance of a doctor. Rotavirus vaccine, also known as live oral rotavirus vaccine, can prevent diarrhea caused by group A rotavirus in infants and young children. Adverse reactions such as vomiting, diarrhea and fever may occur after oral administration of this live vaccine. Mild diarrhea does not require special treatment and can be relieved on its own by drinking plenty of warm water. Severe diarrhea may lead to dehydration, so it is necessary to consult a doctor in time and take montelukast under the guidance of the doctor to help stop the diarrhea, and lactobacillus tablets to help regulate the intestinal flora and treat diarrhea.