Gastrointestinal flu is a kind of cold, which is usually caused by viral infection and has a certain degree of contagiousness and is usually spread through droplets. Patients with gastrointestinal flu spread virus droplets into the air through breathing, coughing and sneezing, and normal people who breathe in the virus or come into contact with items contaminated by droplets from patients may develop gastrointestinal flu. Gastrointestinal flu is a self-limiting disease, which generally does not require antiviral treatment and is mainly treated symptomatically. Patients should get enough sleep and hydration during the recovery period, which can promote recovery. Gastrointestinal flu can be seen throughout the year, often in spring and winter, and is common among people with low resistance for various reasons. When someone around you has a cold, susceptible people should wear a good mask and wash their hands regularly to reduce the possibility of developing the disease. At the same time, susceptible people can do physical exercise in daily life to enhance their physical fitness and reduce the chances of being infected. For patients, they should wear a good mask during the fever, cut off the virus transmission route and keep indoor ventilation, which can effectively reduce the risk of infecting others.