Because acute gastroenteritis has infectious factors, first make sure your hospital has a specialized gastrointestinal clinic to issue such a diagnosis certificate. The hospital generally has a specially printed disease diagnosis certificate. Fill in the name and name accordingly. Age, gender, department, medical record number, unit or address, admission time, discharge time, main examination results, diagnosis, treatment opinions, doctor's signature, medical institution's special seal, and the year, month, and day are sufficient. The following handling opinions are for your reference: 1. Patients with acute gastroenteritis should rest in bed and keep warm. 2. Patients in the acute phase often have symptoms such as vomiting and diarrhea, and lose a lot of water, so they need to replenish fluids. You can provide fresh juice, lotus root starch, rice soup, egg soup and other liquid foods, and drink more boiled water and light salt water as appropriate. No alcohol, no spicy food. 3. Eat small meals frequently. In order to avoid gastrointestinal fermentation and flatulence, you should avoid eating beef and other gas-producing foods during the acute phase, and minimize the intake of sucrose. Pay attention to dietary hygiene. Avoid high-fat fried, deep-fried, smoked, and cured fish, vegetables and fruits with high fiber content, and irritating drinks, foods, and condiments. 4. Use your hands to gently touch your abdomen clockwise. 5. Take medicine on time and follow the doctor’s instructions. 6. Pay attention to physical exercise.