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Early symptoms of stomach flu - What are the usual symptoms of stomach flu? Misnomer. This may be an infection, often a virus, characterized by diarrhea and vomiting. Repeated such episodes can often be due to bad diet.
The main symptoms of Stomach Flu are watery diarrhea and vomiting. Other symptoms are headache, fever, chills, and abdominal pain. Symptoms usually appear within 4 to 48 hours after exposure to the virus and last for 1 to 2 days, though symptoms can last as long as 10 days.