Lower abdominal distension after eating is usually first considered to be caused by gastrointestinal factors, such as irritable bowel syndrome and gastroptosis.
If you often experience discomfort after meals, you can go to the gastroenterology department to clarify the cause through gastroscopy, barium angiography and ultrasonography. If it occurs only occasionally, consideration should be given to whether the lower abdomen is distended and painful due to dietary reasons after consuming excessively spicy and stimulating foods, foods that produce more gas, etc. Such patients usually get better with some rest and no special treatment is needed.