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.
many factors are involved in how much a tattoo costs. what is small to you? i have a small tattoo (3 inches by 4 1/2 inches) and it cost $200. most tattoo artists will charge by the hour and not by the piece. be sure to check out many different shops and artists and don't just go to the first place you find. also check out portfolios of the artists and get someone to do an original piece.