The reason it's important to pass gas after surgery is because passing gas after your surgery is a good sign that your bowels are returning to normal.
This is why after your surgery your doctors or caregivers will ask you if you have passed any gas so they can tell if your surgery has went through good and your bowels are working properly.
Also it's very normal to not have a bowel movement for 4 to even 5 days after your surgery.
If you're not passing gas after surgery it's not always a bad thing but most people who do have surgery do need to pass gas after the surgery and that's a really good sign.
It can be embarrassing to be asked if you've passed gas but it's not as bad as it seems.
I was asked by my doctors in the hospital if I was passing gas and I wasn't sure why they asked that until I asked them why.
They said it was just standard procedure to ask patients after surgery if they passed gas because it was a sign my bowels were returning to normal.