Tattoo. The United States food and drug administration (fda) does not regulate tattoos leaving the burden of tattoo safety and regulations up to individual cities and states. Some of the risks that come with getting a tattoo are infection at the site of the tattoo, allergic reaction to the tattoo dye, the spread of disease such as HIV and hepatitis c, granulomas and keloid formation. No tattoos!
Unlikely. Tattoo has been used to enhance eyebrows and even the lash line. This is subject to the usual minor cautionary notes: the tattoo needle must be sterile; the skin sterilized, the dyes non-toxic and stable. Otherwise this poses no risk.