However, significant changes in the frequency or the appearance can indicate a problem, particularly when these changes occur with other issues, such as diarrhea, constipation, or abdominal pain.

Norovirus is an extremely contagious illness that commonly causes vomiting and diarrhea, according to the CDC. Norovirus causes acute gastroenteritis, an inflammation of the stomach or intestines.

The outbreak is part of a rising trend in stomach bugs causing vomiting and diarrhea. The Public Health Agency of Canada confirmed in an email that it is seeing higher-than-expected case counts of ...