This disorder is associated with several vascular, neurological, and skeletal problems including stroke, heart attack, clotting, mental retardation, eye abnormalities, and osteoporosis, amongst many other complications.
Tattoo tipping etiquette, in general, should hover around 15% for small tattoos and 20% for larger tattoos, but as with all tips, you as a customer ultimately determine the amount based on the quality of service and the work performed. Consider your involvement as well.
Most of the time, a tattoo artist works as an independent sub-contractor in a studio and gets paid a commission rate, usually about thirty to forty percent of whatever the client gets charged. So for a piece that took exactly an hour to ink and the client pays $150, the artist gets $45 to $50 .