Why is gas painful after incarcerated abd wall hernia?

Distension . Usually from distension of the small and/or large intestine. Should resolve within a week or so. If the hernia was repaired, you can always call your surgeon to be sure. If it was reduced only, you should see a general surgeon for a consult regarding repair to avoid this in he future. Hope this helps!
Gas. If you have an incarcerated hernia, gas gets trapped in the incarcerated loop and applies pressure on the walls. This may cause pain. Also, an incarcerated bowel's blood supply gets compromised and that adds up to the pain.
Laparoscopic? If you mean laparoscopic hernia repair it is because the gas, blood and other fluids dissect up under your diaphragm giving you shoulder pain. .