There are no other important organs in this location of the lower left abdomen except the intestines, so the abdominal distension symptoms described by the patient should be due to intestinal flatulence. The patient will feel a gas inside the stomach, and this gas will go around inside the stomach, which is caused by intestinal distension. In addition, if the patient has constipation, it will also cause the slowing down of gastrointestinal peristalsis, and then he will feel bloated, which is actually caused by the slowing down of the peristalsis of the intestinal system. It is also not excluded that the distension of the left lower abdomen is caused by intestinal obstruction, and the patient will have clinical symptoms of nausea, vomiting, absence of stool and absence of exhaustion, which can be further diagnosed under the guidance of a doctor.