Gastroenteritis is divided into two types: acute gastroenteritis and chronic gastroenteritis. Acute gastroenteritis usually improves in about 3-5 days after active treatment, while chronic gastroenteritis tends to recur and usually improves in about 1 week after active treatment, but may recur at any time, depending on the individual. Acute gastroenteritis is mostly caused by improper diet or consumption of food containing pathogenic bacteria and toxins, causing acute inflammatory changes in the mucosa of the gastrointestinal tract, often manifesting as nausea, vomiting, abdominal pain, diarrhea, fever and other symptoms, and in severe cases, critical conditions such as dehydration, electrolyte disorders, shock and sepsis can occur. After active treatment, the symptoms usually resolve in about 3-5 days. Chronic gastroenteritis is mainly caused by chronic inflammation of the gastrointestinal tract, and its triggering factors are related to diet, medication and immune function of the intestine, and most of them can improve in about 1 week after treatment. During the treatment period, you should take more rest, pay attention to your diet, avoid eating spicy, stimulating, greasy food, and eat a diet based on light and easily digestible food, pay attention to the warmth of the abdomen, you can do more abdominal hot compresses, etc.