What should be done if one suffers from acute gastroenteritis? In general treatment, the first step is to eliminate the cause, discarding some unclean food that led to the illness; Secondly, rest appropriately according to the condition, with bed rest for severe cases; Thirdly, patients with severe vomiting and diarrhea should temporarily fast, and gradually introduce some light, easy-to-digest foods as the condition improves; Fourthly, it is advocated to use oral rehydration and salt supplementation to replenish the body fluids lost due to vomiting and diarrhea. Fifthly, keep the abdomen moderately warm; record the frequency and characteristics of the stool; accurately record the amount of urine, paying attention to these aspects. In terms of medication treatment: This includes controlling intra- and extra-intestinal infections and medications that protect the gastric mucosa, as well as treatments involving microecological preparations. The third aspect is to correct dehydration and electrolyte imbalance: during the initial stages of diarrhea, at home, one can use some rice soup, or add a bit of sugar and salt, alternating with plain water and sugar to prevent dehydration. For mild or moderate dehydration, if the patient does not have vomiting or abdominal distension, oral rehydration solutions may be sufficient. In cases of severe dehydration or when the overall condition is poor, indicating potassium, sodium, chloride electrolyte imbalances, and acidosis, intravenous fluid therapy in a hospital is necessary. It is also important to note that both oral rehydration solutions and oral medications should be used correctly under the guidance of a doctor, and should not be taken without professional advice.