The common causes of bloating and abdominal pain in the early hours of the morning include abdominal cold, irritable bowel syndrome and acute gastroenteritis. 1. Abdominal cold: if the night blowing overnight air conditioning, resulting in abdominal cold, so that the gastrointestinal tract vasoconstriction, the gastrointestinal tract blood supply is not enough will also affect its digestion and absorption and peristalsis function, which leads to early morning bloating, abdominal pain. 2. Irritable bowel syndrome: If stimulated by the previous night’s food or cold air at night, triggering irritable bowel syndrome, gastrointestinal tract dysfunction, can lead to early morning bloating, abdominal pain. 3. Acute gastroenteritis: if you eat unclean food at night, intestinal flora imbalance, can cause non-specific dyspepsia, may be early morning bloating, abdominal pain and other symptoms. If the early morning bloating, abdominal pain, must go to the regular hospital to identify the cause of the disease, and actively cooperate with the professional doctor’s treatment.