Post Rhinoplasty Bump on Inside of Nostril and Red Swollen "Membrane": Normal?

I agree that the bump near the columella is a suture. Make sure your surgeon sees you to determine if antibiotics are necessary. The larger bump deep in the nose is most likely the end of your inferior turbinate. The turbinate is a shelf of tissue made of bone, and soft tissue. The turbinate is often cauterized during a rhinoplasty and it may become temporarily swollen. Make sure your surgeon examines you thoroughly.

You may be describing the head of inferior turbinate that are present on both side which basically act as air conditioning structures. It is normal to have one side swell up while the other shrink and vice versa.   You should not manipulate your nose after rhinoplasty. You can cause a nose bleed. Follow up with your surgeon and allow him to explain his findings. 

It is difficult to say what these things are. You may be right about the small bump that could be a suture or swelling.  If you have concerns, I sugget that you contact your surgeontot be evaluated.

From your description it is hard to tell whether it is  synechiae (adhesion) or pssibly small sub mucosal hematoma.

Your  plastic surgeon  needs to examine your nose and treat it.

 First, you should not be looking inside your nose and manipulating it in any manner 3 weeks after your Rhinoplasty.  The redness near the suture is a typical reaction to the suture and should resolve without an issue.  The large red object, you see, inside your nose is a normal structure called the inferior turbinate and it's very normal for this to be red and swollen after a Rhinoplasty.  During your next post op visit, have your surgeon look inside to calm your fears...but sounds normal.