Gastroenteritis clinically known as gastroenteritis is divided into infectious and non-infectious. Infectious gastroenteritis has bacterial, viral, parasitic and other infections. Non-infectious gastroenteritis is stimulated by drugs and alcohol. Bacterial gastroenteritis is mainly caused by eating bacterial contaminated food, i.e. food poisoning. It can also be caused by drinking raw water. The common causative agents are mainly Salmonella, dysentery bacillus, and Escherichia coli. Viral gastroenteritis is most common in children. Common pathogens include rotavirus, adenovirus and norovirus. Parasitic infections common pathogens are amoeba, schistosomiasis, etc. Gastroenteritis has more non-infectious factors. Can be due to long-term eating irritating food, food allergies, alcohol, taking non-steroidal anti-inflammatory drugs, such as aspirin and other stimulation of the gastrointestinal tract caused by the inflammatory response; can also be due to their own digestive tract diseases, such as bile reflux stimulation caused; may also be due to their own intestinal flora imbalance induced by infections and immune disorders. Pay attention to dietary hygiene in daily life. Do not drink raw water, do not eat unclean, spoiled food. Food should be cooked as much as possible and do not eat raw meat.