Nose Piercings and Nostril Jewelry are not a fad. It has been around for a very long time. It is found in many cultures around the world. It has been said that it originated in the middle east about 4,000 years ago. The Jewelry and piercing methods may have changed since then, but the piercing itself remains the same.
The body jewelry that is used in a nose piercing can be either a stud/screw type or a ring. Some options are Captive Rings, although Fixed Bead Rings, are much more highly preferred out of the two rings, because the bead will not fall out which happens constantly with the very light gauge captive rings.
Nostril Screws, Nose Bones, and Fishtails, are the different types of the nostril studs available. All of the body jewelry comes in different metals such as Surgical Steel, Titanium, and 14k Gold (nickel free gold is highly recommended).
The most common place for your nose piercing is through the curve of one of the nostrils. You can pierce this area with no problem it at all. It can take 2-3 months for the piercing to completely heal, but most people will heal sooner when taken care of properly.
You should never allow your nose to be pierced with a ear piercing gun. The guns can not be sterilized properly. This leaves you at risk for disease the HIV and hepatitis. Also you are more likely to develop a Keloid from the gun because it forces the jewelry through the skin.
When a piercer does the piercing it is done with a needle to avoid this trauma, and to make room for the new jewelry. The correct jewelry will then be inserted, not a regular earring made for your ear.