The diarrhea when drinking cold water may be caused by gastrointestinal sensitivity and acute gastroenteritis. It is recommended that patients pay attention to their diet and try to avoid drinking cold water or eating other cold, stimulating food; 2. Acute gastroenteritis: patients usually eat unclean or overeat leading to acute gastroenteritis and the symptoms of diarrhea when drinking cold water. At this time, we should avoid eating cold food, pay attention to abdominal warmth, and if necessary, take oral haloperidol, flavopiridol with montelukast under the guidance of a doctor to relieve symptoms. In addition, patients are prone to dehydration and should be rehydrated in time by drinking warm saline or sweetened saline, and in severe cases, timely infusion of fluids is required. In daily life, you need to adjust the diet structure, develop regular eating habits, try to be light, eat more fresh fruits and vegetables, especially coarse grains and coarse fiber food, and keep regular exercise, which can improve the body condition and relieve the symptoms.