A stomach virus causes a condition called viral gastroenteritis, which is also referred to as the stomach flu. Several different viruses can cause viral gastroenteritis. It is highly contagious. According to the National Institute of Diabetes and Digestive and Kidney Diseases, it's the second-most common illness in the United States and causes millions of diarrhea cases annually. Most people recover without the development of complications, although there can be problems for people who can't replace the fluids lost through diarrhea. Several signs indicate the presence of a stomach virus.
Diarrhea
Viral gastroenteritis may be referred to as the stomach flu, but it doesn't have the signs and symptoms of a respiratory condition. A stomach virus mainly affects the intestines. The main sign is diarrhea. The diarrhea is usually watery with no blood in it. If the diarrhea is bloody, it's an indication of a different infection that's more serious.
Nausea and Vomiting
Nausea is a sign of a stomach virus. Vomiting is also a sign of a stomach virus. The nausea and vomiting can coincide, or they can occur separately.
Other Signs
There can be occasional muscle aches associated with a stomach virus. Occasional headaches can also occur. A fever is a sign of viral gastroenteritis. There can also be abdominal cramps, also referred to as stomachaches.
Time Factors
The signs of viral gastroenteritis typically appear about one to three days after the infection. The signs and symptoms can range from mild to severe. They usually last only a few days, but they can persist for up to 10 days.
