Acute gastroenteritis is one of the common diseases of the digestive system, usually prevalent in the summer and autumn seasons. It may be caused by exposure to cold or improper diet and typically presents with symptoms such as intermittent abdominal pain, diarrhea, vomiting, bloating, and sometimes fever and chills. The stool can be watery, mucous, or even bloody. As for how to stop diarrhea, it depends on the specific cause. If it is gastroenteritis caused by a virus, appropriate antiviral medications can be used in combination with antidiarrheal drugs, such as smectite powder. For bacterial enteritis, treatment primarily involves antibacterial therapy, such as cephalosporins or quinolone medications, combined with antidiarrheal drugs, which often can achieve satisfactory results. Also, a light diet should be maintained, avoiding raw, greasy, spicy, and irritating foods. (Specific medications should be used under the guidance of a doctor.)