Can getting tattoos increase cancer risk? Scientists weigh in on a startling new study

Ink Under the Skin – And In the Blood?

In 2024, tattoos are more popular than ever, with 32% of Americans sporting at least one and an additional 22% having multiple pieces of body art. However, a recent study conducted by the University of South Denmark (SDU) and the University of Helsinki has cast a shadow over this growing trend. Researchers have been exploring whether tattoo ink, which is known to travel from the skin into the bloodstream and accumulate in lymph nodes, could trigger inflammation that might lead to cancerous cell growth.

The study, titled Tattoo Ink Exposure Looks at the Risks of Lymphoma and Skin Cancers – A Danish Study of Twins, analyzed 2,367 twins—one with tattoos and the other without. The results were enough to raise eyebrows in the scientific community. The tattooed twins were found to have a 1.62 times greater risk of developing skin cancer than their ink-free siblings.

Does Size Matter? The Bigger the Tattoo, the Higher the Risk

While any tattoo exposure appeared to increase cancer risk, the study found that size plays a crucial role. Individuals with tattoos larger than the palm of their hand were nearly three times more likely to develop lymphoma or skin cancer than those without tattoos.

Assistant Professor Signe Bedsted Clemmensen, a biostatistics expert at SDU and one of the study’s authors, emphasized that “the bigger the tattoo and the longer it has been there, the more ink accumulates in the lymph nodes.” Over time, this accumulation might lead to harmful effects that