Norovirus is one of the main viruses that cause gastroenteritis, there is no specific treatment for this virus, if vomiting occurs, it should be treated symptomatically. If vomiting occurs, it should be treated symptomatically by oral rehydration salts, gastrofacial anti-emetic, montelukast anti-diarrheal if necessary, and intravenous rehydration. 1. If the water does not vomit, you can take oral rehydration salt, which contains glucose, potassium ions, sodium ions, which can prevent electrolyte disorders and dehydration. The course of norovirus infection is relatively short, vomiting symptoms may be relieved on the same day, and can enter a light diet after relief; 2. When the number of vomiting is high, you need to go to the hospital for timely consultation. Take intravenous rehydration, replenish glucose, saline, vitamins and potassium ions to avoid dehydration and electrolyte disorders, and give anti-emetic drugs, such as gastrofacial, vitamin B6, etc. After the vomiting symptoms are relieved, change to oral rehydration salt and light diet; 3. If the symptoms of fever appear at the same time, give antipyretic treatment. If patients can take the above treatment measures in time, the course of the disease is usually short and they can recover within a few days. Avoid eating raw food, practice good hygiene and wash hands after defecation to prevent fecal-oral transmission.