What causes a bloated and painful lower abdomen while sitting?

Common causes of lower abdominal pain and distension while sitting include: 1. **Gastrointestinal issues**: Conditions such as intestinal flora imbalance, enteritis, or peptic ulcer may lead to lower abdominal discomfort. Intestinal flora imbalance can be caused by dietary irritation or medication; enteritis may be related to consumption of unclean food or bacterial infection; and peptic ulcers may be associated with excessive alcohol consumption, stress, and other factors. 2. **Indigestion**: Long-term overeating or poor dietary habits may cause indigestion. When sitting, gastrointestinal motility slows down, potentially leading to abdominal distension and pain. 3. **Poor blood circulation**: Sitting for prolonged periods may impair blood circulation in the abdominal area, causing mild distension and pain, which usually improves upon standing. 4. **Gynecological conditions**: Gynecological diseases such as pelvic inflammatory disease and endometritis may also cause lower abdominal distension and pain while sitting.