My daughter had diarrhea yesterday. What happened?

Diarrhea after vaccination is considered to be related to immune reaction, improper diet or allergy.

1. Immune reaction

After vaccination, the immune system will produce antibodies, and adverse reactions may occur during this process, including gastrointestinal reactions, such as diarrhea, nausea and vomiting. Usually, it will not cause great impact on health, but it also needs attention and treatment.

2. Improper diet

If you eat unclean or contaminated food after vaccination, it may lead to bacterial infection or viral infection, thus causing diarrhea.

3. Allergy

Some people are allergic to certain ingredients in the vaccine, and allergic reactions may occur after vaccination, including diarrhea, rash, breathing difficulties, etc.