This is a typical manifestation of gastroenteritis caused by food poisoning. The cause may be intolerance to certain ingredients in the food consumed; it may also be that the food itself is not fresh and has spoilage that irritates the intestines. The first thing to do is to do a routine stool examination. If there are white blood cells in the stool, you need to add antibiotics. If there are no white blood cells, then symptomatic treatment is sufficient. For example, take oral intestinal bacteria to regulate the gastrointestinal function and montelukast to stop the diarrhea. Also take oral rehydration salt solution to replenish fluids and avoid dehydration.