Gastroenteritis is an inflammation of the stomach and intestines (both small and large). Viral gastroenteritis is an infection caused by a variety of viruses which occurs more commonly during cooler months of the year. The most common viruses that cause gastroenteritis are norovirus and rotavirus.
The main symptoms of viral gastroenteritis are diarrhoea and vomiting. Other symptoms include headache, fever, and abdominal cramps. In general, the symptoms begin 1 – 2 days following infection with a virus that causes gastroenteritis. Depending on the type of viruses causing the illness, however, the symptoms may last for 1 – 10 days.