What would cause a sudden onset of very watery diarrhea? I was fine all day. Now I have had the diarrhea for 3 hours. Should I take anything to stop it? I am drinking water and I just ate some plain rice. I don't have any more sudden urges but each time

There . There are certain foodborne illnesses that have an acute/sudden onset. You likely ate contaminated food. This type of diarrheal illness usually lasts 24-72 hours. If it has persisted longer than this, you have a high fever, blood or parasites in your stool, and/or severe abdominal pain, then a medical visit is in order. The key with this type of illness is to maintain adequate hydration, and eat a bland diet until a regular diet is tolerated. I hope you are better by now.