I don't get it. maybe I am misunderstaning you.
A man from ancient times doing this for possible medicinal reasons I thought was an interesting theory. Could be.
Btw, they are still not sure what the reasons were. They are working on trying to understand it. The article said, “This investigation has given researchers a new piece to add to the jigsaw puzzle when trying to tease out whether prehistoric tattoos had a therapeutic, symbolic or religious significance.”