Tattoos have long been a popular form of self-expression, but new research suggests they may come with unexpected health risks—specifically a potential link to cancer.
A study conducted by researchers at the University of Southern Denmark’s Department of Public Health and Department of Clinical Research has examined whether tattoo ink could be associated with an increased risk of skin cancer and lymphoma. The findings were based on data from over 5,900 Danish twins in the Danish Twin Tattoo Cohort.
Published earlier this year, the study found that tattooed individuals had a 1.62 times higher risk of developing skin cancer compared to their non-tattooed twin siblings. The research aimed to assess whether tattoo ink particles—which are known to accumulate in lymph nodes—could cause chronic inflammation and trigger abnormal cell growth.
“We can see that ink particles accumulate in the lymph nodes, and we suspect that the body perceives them as foreign substances,” said Henrik Frederiksen, a consultant in hematology at Odense University Hospital and a clinical professor at SDU. “This may mean that the immune system is constantly trying to respond to the ink, and we do not yet know whether this persistent strain could weaken the function of the lymph nodes or have other health consequences.”
The study, titled “Tattoo ink exposure looks at the risks of lymphoma and skin cancers – a Danish study of twins”, collected cancer data from the Danish Cancer Registry and compared it with self-reported tattoo exposure from a 2021 survey.
While the results show a statistical increase in cancer risk, the researchers cautioned that the findings are not conclusive. Variables such as tattoo size, ink color, and pigment type were not fully analyzed, and the team stressed the need for further studies to determine whether certain inks or cancer types are more strongly linked to tattoos.
So, should tattoo lovers be worried?
Not necessarily.
Lead researcher Signe Clemmensen emphasized that while the findings are noteworthy, they’re not cause for alarm. “What I would say to someone with a tattoo or perhaps considering getting a tattoo, is that it’s not something they should be overly concerned about yet,” she told New Scientist.
Rachel Orritt, a health information manager at Cancer Research UK, echoed that sentiment. “There isn’t enough evidence to say that tattoos increase people’s cancer risk; more research is needed,” she said.
In short, while the study opens the door to further investigation, experts advise caution—not panic.