Norovirus infection is a specific type of gastroenteritis. Distinguishing whether or not gastroenteritis is caused by norovirus infection is also based on a variety of tests. Gastroenteritis is generally an inflammation of the gastrointestinal mucosa caused by bacterial, viral, fungal, and parasitic infections, which may lead to symptoms such as abdominal pain, nausea, vomiting, and diarrhea. Norovirus infection is a special type of gastroenteritis, which may also cause symptoms such as vomiting, diarrhea, fever, nausea, and in severe cases, dehydration or even death. Therefore, once nausea, vomiting, diarrhea, fever and other symptoms of gastroenteritis, you need to go to the hospital for further blood tests, stool routine or stool, vomit test norovirus nucleic acid, antigen and other items to find the cause. It is also necessary to eat a light diet, avoiding cold, spicy, stimulating and greasy food.