Umm.. I don’t have my nose pierced, but I’m pretty sure they don’t use a gun like they do for ear piercings. How would they get it up your nostril? They’ll probably use a needle just like they do for most non-ear piercings. No matter what you ask for. It’ll probably hurt just like any other piercing. You’re nose is basically cartilage. You’ll be just fine. I’m guessing a pain of about 3 or 4. (Unless you’re super sensitive.) I think it’d take a few months to heal completely. Again, it’s cartilage. I’m basing my judgment off of the fact that I wasn’t supposed to take my cartilage piercing out for months. It’s in your nose, it can get infected. Follow the instructions they give you. Keep it clean.