I had a similar surgery about 4 years ago, I don't recall the technical term for it, but basically it was to modify the structure of my septum and mucous membranes.
Having been briefed it would be a couple of weeks or so before I could return to work and given a regime of salt water sprays etc, I did have some post operative problems with bleeding. I'd carefully resisted poking at it, and generally concentrated on keeping my face immobile, but a couple of days before I was due back at work I was sitting at my PC and yawned - a big face stretching mega yawn - and I felt a tiny stab of pain in my nose and immediately had a major nose bleed. It wasn't quite a full on spurting "ER style" gush, but it was far more than I'd ever seen coming out of somebodies nose! Soaking tissues, washing up bowl to reduces the mess in the car, and off to casualty with Mrs Pit Bull at the wheel, where the NHS' finest cauterised it. Needless to say if I'd been airborne at that moment I would have been very little use to proceedings.
I had a repeat performance a few days later, and then a number of less severe bleeds over the next month so before it was finally, unequivocally healed up and I got back to flying.
So all in all a bit of a pain, but I am very glad I did it. It was a total revelation to me to be able to take a deep breath through my nose and not sense a restricted flow. It may sound silly, but I just never realised you were supposed to be able to do that! Having a decent airway, as well as having a good chunk of mucous membrane trimmed off, also made a big difference to my hayfever (which I started getting in my late 20's) and made it much easier to control.
However, the biggest change was yet to come. Between being grounded due to continual sinus problems, seeing the compnay doctor, being referred to a specialist, having the imaging done, getting the operation, and then recovering, all told I was off the line for about 5 months. I can't fault my employers behaviour - as soon as they realised I'd developed a serious problem they were very good about it - and I did do a desk job for most of the time I was off.
But, with 5 months of regular sleep, regular meals, no sprinting around the terminal trying to change jets and make the schedule, seeing my family every day instead of fleetingly between tours, my overall quality of life had changed beyaond all comparison.
I was half a stone light, vastly more mentally alert, less irritable (these things are relative - I'm still a grumpy sod!) so much as I enjoy flying aeroplanes I only went back on line for long enough to find a reasonably paid non flying job.
pb