Postpartum abdominal distension may be caused by slowing down of gastrointestinal peristalsis after cesarean section, indigestion and acute gastroenteritis. 1. Slowing down of gastrointestinal peristalsis after cesarean section: women will be anesthetized during cesarean section surgery. If the function of gastrointestinal tract can not be fully recovered in a short period of time after anesthesia, it may cause slowing down of gastrointestinal peristalsis, which will lead to gastrointestinal flatulence. 2. Indigestion: If pregnant women eat too much indigestible food in a short period of time, it may cause gastrointestinal digestive disorders, which may lead to gastrointestinal flatulence. 3. Acute gastroenteritis: Acute gastroenteritis can lead to abdominal pain, diarrhea, bloating and other uncomfortable symptoms. Pregnant women who experience symptoms such as bloating and abdominal pain after giving birth should seek medical attention as soon as possible to identify the cause of the symptoms and treat them accordingly.