The bloating in the second half of the night is considered to be caused by the following aspects: Firstly, it is considered that there may be bacterial infections in the diet at night or acute gastroenteritis caused by eating spoiled or expired food, and acute gastroenteritis is mainly characterized by abdominal pain, abdominal bloating with diarrhea as the main manifestation. Secondly, it is considered to be due to the lowering of temperature in the second half of the night or blowing air conditioning in the first half of the night, which leads to cold, ischemic contraction of the blood vessels in the human intestine, ischemic state of the intestinal mucosa absorption of gas and peristalsis function are poor, the gas can not be excreted down or can not be absorbed by the intestinal mucosa cells, consumption, abdominal distension will occur. Third, consider the irritable bowel syndrome, gastrointestinal bloating and abdominal pain symptoms caused by cold or food stimulation. If the above situations, you can drink more hot water or use a hot water bag to apply hot compresses to the abdomen, if there is diarrhea available antibiotics.