Teens get tattoos or body parts pierced for different reasons.Most teens get a tattoo or body piercing because they like the way it looks or to express themselves. Some get a tattoo or piercing to feel like part of a group. In some states and cities, you need to be 18 or have a parent's permission to get a piercing or tattoo.

Before you decide, you should know about the possible health risks. And if you do decide to get a tattoo or body piercing, it's important that it's done safely.

Ink is injected into the skin with a tattoo machine. Attached to the machine is a bar with needles that move up and down inside a tube, vibrating 50 to 3,000 times a minute. Because the skin is punctured, there's usually a lot of bleeding and the machine must be stopped often to wipe away the blood. It...

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