If you eat greasy food under the condition of poor digestion, it will easily lead to greasy food sticking to the surface of the intestinal wall, resulting in intestinal peristaltic disorder, causing diarrhea to worsen or poor digestion. In this case: 1, pay attention to diet, eat light food as much as possible, pay attention to the combination of work and rest, exercise, improve physical fitness, pay attention not to eat fried, spicy, stimulating food. 2, can be appropriate to give drug-based treatment. The clinical use of Clostridium Typhimurium capsules, 1 time 2 capsules, 1 day 2-3 times. Montelukast, 3 grams once, 2 times a day. If the symptoms are still not relieved, it is better to improve the routine stool examination to clarify the presence of occult blood and white blood cells. If necessary, a colonoscopy can be completed to further clarify the diagnosis. Therefore, in the case of diarrhea from eating greasy things, symptomatic supportive treatment is needed to reduce the trigger attack as much as possible.