There are many venues that do professional piercings for the nose as well as other body parts like the ear, eyebrow, tongue and lip. Some tattoo parlors may also offer a piercing service.
In America, most states have laws that restrict piercings to those aged 18 or over. It may be possible to be pierced with a parent's permission but that is dependent on the establishment and on the local and state laws.
After washing your hands thoroughly, clean the area of a nose piercing twice daily using a diluted antibacterial soap solution and a cotton swab. Clean the nose jewelry by soaking it in a salt bath.
Like all piercings and permanent body modifications, nose piercings do hurt. A nose piercing hurts somewhat more than a belly or ear piercing due to location, but the piercing professional may be able to apply topical anaesthetic to help with discomfort.
In the United States, body piercing laws vary by state, but most states require parental permission for body piercings under the age of 18. Sometimes, this explicitly excludes earlobe piercings.
A nose piercing hurts more when compared to other body piercings, including ear piercings. A nose piercing involves inserting a sterile needle through a nostril or through the septum, both of which are made of cartilage.
A woman may choose to get either nostril pierced. Piercing placement is a decision based on personal preference and aesthetics. There is no medical reason to favor one nostril over the other.