Stomach Flu Symptoms 2024 Adults. In general, vomiting should resolve within a day or two whereas loose stools can last longer. Gastroenteritis can be caused by viruses, most commonly norovirus, bacteria and parasites.
Viral gastroenteritis is an intestinal infection that includes signs and symptoms such as watery diarrhea, stomach cramps, nausea or vomiting, and. Also known as the stomach flu or bug, norovirus often triggers painful gastrointestinal symptoms as well as fever, aches and headaches within days of.