A person who is a forming a design is made by inserting ink, dyes, and pigments, either indelible or temporary, into the dermis layer of the skin to change the pigment are tattoo artist The art of making tattoos is tattooing
The art of Thangka painting and the tattoo seems to be parallel. As a thangkapainting tells a thousand-year-old story, so does the tattoo. Both have pretty artistic expression. These days most of the tattoo artists have been referring Thangka paintings to make tattoos so that they might give some life lessons to the viewers.
Here's an article by Heidi Minx that portrays the connection between Thangka and tattoo, and what other young artists have to say about .