1. Tattoo ink actually comprises of pigments that are suspended in carrier solution, and isn't exactly ink.
2. Tattoos and doctors can be associated with one another. For example, tattoos are used for medical purposes like radiation therapy and reconstructive surgery.
3. The easiest pigment to remove is black, followed by red. Green pigment is the hardest to remove, and requires many sessions of laser treatment to remove it, often scarring the skin in the process.
4. According to Guinness World Records, the world's most tattooed person, who has his entire body covered with black ink, is New Zealand-born performer Luck Diamond Rich.
5. Which is the most painful part of the body to get a tattoo? Well, that depends on each individual's threshold of pain. While tattoo artists say vote the ribcage as the most sensitive area, doctors say it is the sensitive areas of the body, where there are clusters of pain sensors and areas where there are high concentrations of nerves and little fat tissue with bone beneath, such as the forehead, or shin etc...