The causes of diarrhea when cold are abnormal gastrointestinal function, gastroenteritis, irritable bowel syndrome and so on. 1. Abnormal function of the gastrointestinal tract: Because the abdomen is cold, the smooth muscle of the gastrointestinal tract undergoes spasmodic contraction, which leads to accelerated peristalsis of the gastrointestinal tract and accelerated discharging of food residues, thus triggering the symptoms of diarrhea in patients. 2. Gastroenteritis: After the abdomen is cooled, it is easy to cause bacterial and viral infections in the gastrointestinal tract, triggering gastroenteritis in patients. Due to the constant stimulation of inflammatory factors, the gastrointestinal tract muscle spasm contraction, resulting in gastrointestinal tract peristalsis accelerated, which triggered the symptoms of diarrhea. 3. Irritable bowel syndrome: after the abdomen is cooled, the patient’s gastrointestinal tract function disorder, intestinal flora imbalance, intestinal power abnormality, which leads to the patient’s intestinal peristalsis accelerated, triggering the patient’s diarrhea symptoms. If the patient’s abdomen is cold, it is recommended that the patient improve the relevant examination to clarify the cause of the disease, and follow the doctor’s instructions for treatment. At the same time, in daily life, pay attention to warm measures, so as to avoid the abdomen again cold.