Is it normal in the stomach flu to continue to have diarrhea for several days after the nausea subsides?

Eat a plain diet: Diarrhea can often outlast stomach symptoms when you have a viral gastroenteritis or stomach flu. As your body is clearing the virus, the virus moves down. Also sometimes after infection your intestines may be irritated and unable to digest and reabsorb as well as usual. Stay well hydrated and consider avoiding irritating foods (milk, fiber) until you feel better. wash your hands frequently.