Stomach pain, stomach pain, diarrhea, and nausea are directly related to an acute gastroenteritis attack and can be diagnosed through routine stool tests. During an attack of gastroenteritis, the patient’s digestive system function will be affected, not only the emptying time of the stomach contents will be relatively prolonged, causing nausea and vomiting, but also the spasmodic pain in the stomach due to the stimulation of the mucous membrane by stomach acid. Inflammation of the intestinal mucosa can also occur during the disease. Due to the inflammation, not only the nutrient absorption function of the intestine will be affected, but also the peristaltic speed will be accelerated, and the food residues in the intestinal system will be excreted quickly because the water is not absorbed, resulting in diarrhea. When these symptoms occur, the patient should go to the hospital for a routine stool examination to confirm the diagnosis and understand the cause of the disease. The main treatment is medication, mainly rehydration, anti-diarrhea, anti-emetic and other supportive treatment.