Frequent diarrhea after meals may be caused by irritable bowel syndrome, maldigestion and malabsorption syndrome, food allergies and so on. 1. Irritable bowel syndrome: patients with irritable bowel syndrome do not have organic lesions, often associated with the patient’s emotional changes, environmental stimuli, etc., can be accompanied by varying degrees of abdominal pain, abdominal drop, etc., the symptoms can be relieved by themselves after a bowel movement. 2. Maldigestion and malabsorption syndrome: Maldigestion and malabsorption syndrome is caused by a variety of reasons that lead to impaired digestion and absorption in the small intestine, nutrients can not be absorbed and utilized normally, and discharged from the feces, which is manifested in diarrhea symptoms. 3. Food allergy: If you are allergic to a specific food, you may experience diarrhea when you have a gastrointestinal allergic reaction after eating the food. At this time, you need to carry out allergen screening, as long as you do not come into contact with allergenic foods, diarrhea symptoms will be self-cured. Frequent diarrhea after meals may also have other causes, it is recommended to consult a doctor in a timely manner, improve the examination, clear the cause of the disease and then actively carry out treatment.