There are many reasons for diarrhea after eating cooler, mainly related to unclean food, infection, irritable bowel syndrome and so on. 1. unclean food: when the human body consumes unclean food, it will cause gastrointestinal stimulation, further triggering intestinal spasms, thus leading to diarrhea. 2. Infection: when taking certain foods, it will lead to bacterial or parasitic infection, which clinically manifests itself in a series of gastrointestinal symptoms such as nausea, vomiting, abdominal pain and diarrhea. 3. Irritable bowel syndrome: patients suffering from irritable bowel syndrome may experience diarrhea after taking cool or spicy stimulating foods. There may also be other causes of diarrhea after eating cold food. When the above symptoms occur, it is recommended to consult a doctor in time to improve the relevant examinations and carry out targeted treatment and therapy after clarifying the cause.