Does Ibuprofen Reduce or Cause More Swelling?

In general, the following things should be avoided 2 weeks before and 2 weeks after your rhinoplasty:

1) NSAIDS
2) Vitamin E
3) Fish oil
4) Herbal supplements

As you mentioned, ibuprofen can cause bleeding, which is a non-steroidal anti-inflammatory drug. Unfortunately, it will not help decrease swelling 3-4 weeks post-op. The nasal tip is usually the last to come around, and it will take time for the swelling to resolve. It is best to be patient and wait it out. Hyperbaric oxygen can help with swelling, but it is most effective when received closer to your surgery. I would recommend following up with your surgeon and see what they advise to help with swelling. 

thank you for your question,
In fact, ibuprofen does not help much to reduce swelling, as other doctors have said here in the forum, the best for these cases is the time. 
good luck!! 

Advil is good for inflammatory swelling, but doesn't really do much for postsurgical swelling. So we don't recommend our patients taking it before or after rhinoplasty.

In general, postsurgical swelling does not respond well to either steroidal or nonsteroidal anti-inflammatory medications, and we do not recommend using these in our practice. Thank you. Dr Joseph

That's a reasonable question.  Yes Ibuprofen is an anti-inflammatory agent however it will not help with your nasal swelling.  The only thing shown to help is time.