The causes of diarrhea as soon as you eat cold are irritable bowel syndrome, gastrointestinal dysfunction, inflammatory bowel disease and so on. 1. Irritable bowel syndrome: patients with irritable bowel syndrome have a sensitive gastrointestinal tract, when gastrointestinal peristalsis is enhanced, weakened or spasm, the kinetic response to intestinal contents as well as certain gastrointestinal hormones is too strong, and diarrhea occurs when you eat cold things. 2. Gastrointestinal dysfunction: it is a chronic recurrent gastrointestinal disease, the etiology of which is still unclear and may be related to food and gastrointestinal infections and other factors. Satiety and diarrhea can occur after eating, and diarrhea mostly occurs after meals. 3. Inflammatory bowel disease: Inflammatory bowel disease is a non-specific chronic inflammatory bowel disease, mainly including ulcerative colitis and Crohn’s disease, diarrhea symptoms can occur after eating cold food, can be accompanied by abdominal pain. There are many other causes of diarrhea when eating cold food, and it is recommended that patients seek timely medical attention after experiencing this symptom, so as not to delay the condition.