Eating greasy food may cause diarrhea due to indigestion, chronic enteritis, etc. It is recommended to go to the hospital in time to determine the cause and treat the cause. Common causes and treatment methods are as follows: a. Indigestion: the elderly, children, maternity, open heart surgery patients and other weak people, the spleen and stomach are weaker than adult healthy people, eating greasy food is not easy to digest, resulting in indigestion caused by diarrhea. This can be treated with oral digestive enzymes, lactobacillus tablets, and other medications. In addition, usually forbidden to eat cold nature, easy to damage the spleen food, such as bitter gourd, cucumber, celery, lettuce, etc., can eat more red dates, yam, white atractylodes, poria and other foods that benefit the spleen and stomach. Second, chronic gastroenteritis: chronic enteritis patients due to gastrointestinal tract dysfunction, when eating too greasy food, there will be abdominal pain, diarrhea and other symptomatic performance, the heavy can have mucus stool or watery stool. Patients can improve intestinal flora with Bifidobacterium tetracosum and Bacillus licheniformis live bacteria, while giving montelukast for antidiarrheal treatment to relieve symptoms. After the diarrhea symptoms are under control, the corresponding drugs should be selected to treat chronic gastroenteritis according to the etiology that triggers chronic enteritis, as follows: 1. bacterial infection: antibiotics such as cephalosporins, quinolones, erythromycin, gentamicin, and flavopiridol should be used for treatment; 2. parasitic infection: treatment with praziquantel, and those who take the drug may experience dizziness, headache, nausea, abdominal pain, diarrhea, weakness, and sore limbs Adverse reactions; 3, fungal infections: use mycophenolate and amphotericin for treatment. Note: For people who have diarrhea when they eat something greasy, it is recommended to eat less and more, chew slowly, and try to choose foods with high nutritional value, easy to digest, and rich in protein, such as eggs, lean meat, shrimp, etc., with the right amount of fruits and vegetables, supplementing fiber and vitamins is beneficial to the digestion of food.