Body modification is when you change or alter your body in some way. For example, people might get tattoos or piercings as a form of body modification. Tattoos are when special ink is put beneath your skin with a needle. Piercings are when a hole is made in your body, like in your earlobes, and you can wear jewelry or decorations in the holes. People change their bodies in other ways too, like stretching out their earlobes, getting surgery to change body shape, or getting braces to straighten their teeth.