Stomach flu is usually not a serious medical condition. However, seek medical help if you have diarrhea for more than 3 days, blood in your stools, or severe dehydration.

• Diarrhea that last for two days or more
• Blood in your stool (Could be a sign of more severe infection)
• Sign of severe dehydartion (Dry lips or dizziness)
• Diarrhea and fever for over 48 hours