I wonder if the increase in cancer in young people is connected to the recent prevalence of tattoos? If I were a betting man, I’d wager so; I assign that a pretty high probability. Tattoo ink is fairly invasive physiologically and creates persistent irritation/inflammation. And irritation is a known cause of cancer.

My guess is tattoo ink acts as a substance that enhances tumorigenicity when applied after a carcinogen. So, it’s multi-causal but that’s pretty common in today’s world; we’re exposed to various carcinogens all the time.