Stomach Flu

Stomach flu, or gastroenteritis, is a contagious virus that causes nausea, fever, diarrhea, and vomiting. Stomach flu can often be treated at home with regular hydration, but visit a doctor if your symptoms are severe or last longer than a few days. With children, it's best to get them examined if they have a fever or are vomiting, as they're more at risk of complications.