I have had three sessions of a nasal contouring injection. It seems to have had a slight effect, or maybe not... I deliberately asked them to use one containing steroids, but I cannot really tell that it worked.
My thick, bulbous nose seems to have gained a little definition. It also seems to have become slightly slimmer, as if the swelling went down. If you are really concerned but absolutely do not want surgery, it may be worth trying.
Also, this place is great for inflammatory acne injections. When I get large, hard pimples that cannot be squeezed, I come here. They hurt like crazy because of the nature of the injection, but the acne settles down immediately, which is great.
However, be careful because it contains steroids.