Hello,
Diarrhea and vomitings can be provoked either by an intestinal infection or by illness somewhere else in the body. When they begin suddenly, the problem is usually
gastroenteritis (or stomach flu), most often caused by a virus and sometimes by bacteria and parasites.
Gastroenteritis is an irritation and infection of the digestive tract. It can often cause sudden and sometimes violent upsets and may be confused with spastic colitis.