Since the beginning of the year, there has been a significant increase in the number of patients with diarrhea. This round of diarrhea is characterized by a rapid onset, dilute watery stools, mild abdominal pain, vomiting and low-grade fever in some patients. Most patients also have cold symptoms such as headache, sore throat and runny nose, which is known as gastrointestinal cold. This round of diarrhea is mostly caused by viruses, including cup virus and rotavirus. 90% of patients can be cured in 2-3 days by controlling their diet and taking oral rehydration at home. At home treatment points: 1, control mouth. Soft and easy to digest diet, no meat, eggs, dairy products and fruits, no acid, spicy and other stimulating food. Do not drink tea and coffee. 2, drink more water. The most serious complication of gastroenteritis is dehydration, which induces thrombotic diseases, aggravates diabetes, coronary heart disease and other underlying diseases. Therefore rehydration is important. Drink about 1500-2000 ml of water daily. Sugar, salt and juice can be added appropriately. 3.Take less medicine. Mild cases can not take medicine. You can also take oral astringent antidiarrheal drugs such as montelukast, cardoquine, bismuth, etc. Chinese medicine available gastrointestinal an, patchouli, etc.. Antibiotics such as norfloxacin and ciprofloxacin can be taken secondary to bacterial infection. Note that if there is severe vomiting, high fever, severe abdominal pain, pus and blood stools should be promptly to the hospital.