Is tattoo ink linked to lymphoma or skin cancer?

What's actually in it

Tattoo ink is a cocktail of pigments, carriers, and preservatives. Many colored inks contain azo dyes, which can break down into carcinogenic compounds when exposed to sunlight or your immune system. Black inks often contain polycyclic aromatic hydrocarbons (PAHs), which are known carcinogens. The pigment particles are injected into the dermis, where they stay permanently. Over time, some particles migrate to your lymph nodes.

What the research says

A 2026 narrative review in a dermatology journal gathered the available evidence on tattoo ink and cancer risk. The review found a growing body of research suggesting a link between tattoos and lymphoma, the cancer of the lymphatic system.

The connection makes biological sense. Tattoo pigment particles travel from the skin to the lymph nodes, where immune cells try to break them down. Some pigments release toxic breakdown products in the process. Over years and decades, the lymph nodes accumulate more and more of these foreign particles and their chemical byproducts.

The review also found reports linking tattoos to skin cancers that appeared directly on or near tattooed areas. While the numbers are still small, the pattern raised concerns, especially for people with large or heavily colored tattoos.

Not all inks are equally risky. Red and yellow pigments tend to contain the most concerning chemicals. Black carbon-based inks have their own issues with PAHs. There's currently no standardized safety testing required for tattoo inks before they're sold.