Wherever possible disposable instruments should be used. The person performing the piercing should wear disposable medical gloves. Anybody who is in ANY doubt as to the standard of hygiene should look elsewhere. Any piercing jewellery should also be steralised before insertion into a new site. This type of piercing can easily become infected causing scarring.
Arteries supply blood under pressure and once severed bleed heavily and are difficult to stop.
All piercings produce bleeding but the amount depends on which type of blood vessel is damaged and how big it is. The most common areas for problems are the tongue and genitalia both of which have very strong blood supplies. Anybody piercing the face or mouth needs to have at least a basic knowledge of anatomy including position of all relevant nerves and blood vessels. Tongue piercing can easily cause excessive bleeding as the tongue has a very good blood supply. Nerve Damage Nerves are responsible for our sense of feeling such as touch and also for controlling muscle movement so it follows that damage to nerves should be avoided at all costs.