Oral rotavirus vaccine does not require treatment for mild diarrhea, and may be prescribed by a doctor for severe diarrhea. Oral rotavirus vaccine is clinically used to prevent diarrhea or gastroenteritis in infants and young children due to rotavirus infection. Some children may experience transient fever, vomiting, diarrhea, and other adverse reactions, which usually disappear after 1~2 days. Therefore, mild diarrhea after oral administration of rotavirus vaccine does not require special treatment, and parents do not need to worry too much. If the child’s diarrhea is serious or lasts too long, if necessary, follow the doctor’s instructions with bifidobacteria, Lactobacillus acidophilus and other intestinal microecology, and montelukast to protect the intestinal mucosa. During the period of diarrhea, parents should pay attention to the child’s water supplementation, to prevent water electrolyte disorders, acid-base imbalance. Parents are advised to follow the doctor’s instructions for the child’s medication and pay attention to the child after oral administration of rotavirus vaccine. If your child develops a rash, respiratory distress, persistent high fever, etc., consult a doctor immediately to prevent accidents.