Is the gauze pad placed under the columella after rhinoplasty there to keep it lifted or just for the bleeding?

The gauze pad placed under the nose is generally there to soak up any blood and mucous that is dripping from the nose.  Most rhinoplasty surgeons will place a nasal splint and tape on the nose to help protect and support the nose during the healing period, however, this is separate from the gauze dressing that is placed under the nose.  

Most rhinoplasty surgeons place a gauze underneath the nose to collect any oozing of blood after surgery. It is normal to ooze a bit after surgery and you may need to change this dressing a few times during the first day after your surgery. If you have persistent and heavy bleeding or any concerns, then I recommend contacting your surgeon. 

Thank you for your question.  The guaze pad is just meant to collect any drainage from your nose and should be changed as needed.

All the best!