The causes of a cold stomach at night include dietary factors, environmental factors, and gastrointestinal cold. 1. Dietary factors: eating too much cold, cool food before going to bed can cause the stomach cold when sleeping at night, such as ice-cold beer, ice cream, ice watermelon sago dew, and so on. 2. Environmental factors: Under normal circumstances, people’s metabolism will slow down during sleep, and the body’s own heat production will also have a significant decline. This is the case if they do not wear clothes, do not cover the quilt plus the environment is cooler will cause the stomach cold at night when sleeping. 3. Gastrointestinal cold: gastrointestinal cold will often appear diarrhea, abdominal distension, nausea, vomiting and other clinical manifestations, easy to sleep at night when the stomach is cold. Those who have cold stomach at night should pay attention to the protection of gastrointestinal tract in daily life, sleep under a thicker blanket, and consume less chilled and stimulating food. If the cold stomach continues to be unrelieved, it is recommended to consult a doctor in time to avoid delaying the condition.