I sat for 6 hours yesterday completing the outline of a polynesian style 3/4 sleeve. The first 3-4 hours was ok. The last hour or so was pretty miserable. Any strategy I had to deflect or cope with the pain was out the window. I'm sure it was probably due to the duration of the sitting, but doing the outline on the upper inside of my arm and my elbow pretty much sucked.
The bad news is that I'm going to complete the shading (it will be black only tattoo) today. Arm is feeling better than expected this morning, but not looking forward to another 5-6 hours. However, that is the price I pay for wanting instant gratification and choosing a highly respected (and in demand) polynesian tattoo artist that is not only 5 1/2 hours away, but in another country.