There are more reasons for the stomach to become bigger after laparoscopic surgery, mainly including urinary retention, abdominal distension and abdominal bleeding. 1. Urinary retention: Laparoscopic surgery requires anesthesia, and anesthetic drugs may have an effect on the bladder’s forced urinary muscle, causing difficulty in urination. Excessive urine remains in the bladder, which tends to cause increased pressure in the abdominal cavity, making the stomach bigger. 2. Abdominal bloating: after laparoscopic surgery, there is a wound in the abdominal cavity area, the patient needs to stay in bed, the gastrointestinal function is damaged, and before ventilation, it is easy to have abdominal bloating, resulting in a big belly. 3. Abdominal bleeding: laparoscopic surgery is prone to cause abdominal bleeding if it is not operated properly, or if the postoperative care is not proper. When the amount of abdominal bleeding is large, the belly will appear to become bigger. If you have a bigger belly after laparoscopic surgery, you should pay attention to it and go to the hospital in time to get a clear diagnosis and early treatment.