If you're considering your first permanent tattoo and have seen headlines linking tattoos to cancer, here's the short answer: getting a tattoo carries real, well-documented risks—infection, allergy, and abnormal scarring—while the link to cancer, specifically lymphoma, is currently based on a single study whose result is close to the threshold for statistical significance and whose own authors warn against interpreting it as cause and effect. Understanding the difference between these two types of risk lets you make an informed decision based on the facts, rather than on the headline you read.
- Infection and allergic reactions, especially to red pigment, are the best-established risks and depend to a large extent on the studio and the ink used.
- The exact composition of tattoo ink varies by brand and color, and European regulations have phased out certain pigments considered dangerous.
- A 2024 Swedish study found a statistically weak association between getting tattooed and lymphoma, not proof that tattoos cause it.
- Choosing an authorized studio, asking for approved ink, and knowing when to consult a doctor reduce the risks that are within your control.
- Trying a temporary or semi-permanent design first helps you decide on the size and placement, but it does not predict any of these health risks.
Known and well-documented risks to consider before getting tattooed
Before getting to the question about cancer, it's worth establishing what research and clinical practice have shown about tattoos. Infection is one of the best-known risks, and it doesn't depend solely on the studio's hygiene: ink can be contaminated even inside a sealed container or one labeled sterile, often because non-sterile water was used to dilute the pigment (FDA). That's why asking where the ink comes from matters just as much as asking how the equipment is sterilized.
Allergic reactions are the second best-documented risk, and not all pigments cause them equally: red pigment most often causes abnormal reactions, while carbon-based black ink causes the fewest problems, although it is not completely free of them (AEDV). Because the ink remains permanently under the skin, an allergic reaction can persist over time instead of going away on its own; if you develop a high fever, chills, or sweating along with symptoms around the tattooed area, these are signs of a serious infection that needs medical treatment, sometimes with prolonged antibiotic treatment or hospital admission (FDA).
Granulomas can also form: these are small bumps that appear because the body treats the ink as a foreign object. Anyone prone to developing keloids faces the same risk of abnormal scarring from getting tattooed as from any other wound to the skin (FDA). None of these risks can be predicted with certainty before getting a tattoo, but they can be reduced depending on where and how you choose to get it.
What makes a studio safer
Each of these risks depends to a large extent on the studio where you get tattooed, the source of the ink, and the equipment sterilization protocol; later, you'll see exactly what to ask before you sit in the chair.
What tattoo ink really contains and how the European Union regulates it
The composition of tattoo ink is not uniform: it varies by brand and color, which partly explains why not all inks carry the same risks. Black ink is usually carbon black-based, which can contain polycyclic aromatic hydrocarbons, and other colored pigments have included heavy metals such as cadmium, mercury, nickel, cobalt, or chromium; some of the allergenic potential of red ink has been linked to the mercury sulfide found in certain formulations (general overview of tattoo ink).
European regulations have responded to this variation by removing certain pigments considered dangerous from the market: since 2021, the use of Blue 15:3 and Green 7 pigments in tattoo inks has been prohibited, and manufacturers must declare the dangerous ingredients they contain on the label (general overview of tattoo ink). This does not eliminate all uncertainty about the composition of any specific ink, but it does give you a practical reason to ask the studio for ink approved in Spain or the European Union, and to photograph the container—manufacturer, batch, and registration number—so you have that information available if a problem comes up later (AEDV).
Do tattoos cause cancer? What a recent study does—and doesn't—show
This is a question worth taking slowly. The pigment particles in a tattoo don't stay only in the skin: over time, some can migrate and accumulate in the lymph nodes, and there still aren't enough long-term studies to know what effect this has on health (general overview of tattoo ink). This is the biological basis for investigating whether there is a link between getting tattooed and developing lymphoma, a cancer of the lymphatic system.
The study most often cited so far is a Swedish case-control study published in 2024, which compared 1,398 people with lymphoma with 4,193 people without lymphoma. The overall result was an incidence rate ratio of 1.21 among those who had ever been tattooed, with a 95% confidence interval of 0.99 to 1.48 (Nielsen, Jerkeman and Jöud, eClinicalMedicine, 2024). That interval includes the value 1, “no effect,” so the result is close to the threshold for statistical significance and does not allow us to confidently claim a real association at the population level, much less that tattoos are the cause.
Within the same study, the subgroup with the highest risk was people whose first tattoo was less than two years earlier, with an incidence rate ratio of 1.81 (95% confidence interval: 1.03–3.20) (Nielsen, Jerkeman and Jöud, eClinicalMedicine, 2024). The authors are clear about the limitations of their work: a single epidemiological study cannot establish causation, they cannot rule out the possibility that other unmeasured factors explain some of the result, and they call for caution when generalizing their conclusions to people over 60 (Nielsen, Jerkeman and Jöud, eClinicalMedicine, 2024). It's a signal that warrants further research, not a definitive answer.
Why tattoo size didn't seem to matter in the study
If the relationship were a direct cause-and-effect one, you might expect the risk to be higher with more tattooed skin. The Swedish study found no such relationship: a larger tattooed body surface area was not associated with a higher risk of lymphoma (Nielsen, Jerkeman and Jöud, eClinicalMedicine, 2024). This lack of a dose-response relationship is precisely one of the reasons the researchers themselves urge caution before talking about causation.
What to ask at the studio and when to consult a doctor
You can reduce many of the risks described above by making specific choices before and after getting tattooed. Always choose an authorized studio with the required health permits in order, and ask directly what sterilization protocol it follows for its equipment and needles (AEDV). Ask to see the ink container and check that the ink is approved in Spain or the European Union; photographing the manufacturer, batch, and registration number gives you something to refer to if a reaction appears later and you need to identify which ink was used (AEDV).
If you need to have an MRI in the future, let them know you have a tattoo: in rare cases, you may feel stinging or swelling in the area during the scan (FDA). And if you develop a fever, a bump that doesn't go away, or a reaction that gets worse instead of better after getting tattooed, see a doctor rather than waiting for it to resolve on its own.
A temporary test helps you decide on the design, not predict these risks
None of the above is resolved by trying a temporary or semi-permanent design first, and it's worth being clear about that: this kind of test helps you see how a design looks, what size works best, and where on the body it fits; it does not predict whether it will hurt, how your skin will heal, whether you'll have an allergic reaction, or how permanent ink will age over the years. Those answers depend on the studio, the technique, and each person's skin. One reason is that the application process is not the same either; if you're interested in the technical details, what layer of the skin a permanent tattoo is injected into explains this separately.
That said, seeing the exact design on your skin, in the actual location and size, is still a useful step while you decide, without having to resolve all the health questions covered here first; this article on why it's worth trying a tattoo before making it permanent explores the idea in more detail. A simple, minimalist design, such as a small cross, is a good example of something you can assess this way before committing to something permanent.
If you want to explore more options to try before deciding, you can browse the collection designed for a first tattoo, with designs intended to help you assess size and placement without committing to something permanent just yet. And if you're interested in how the semi-permanent ink we use at InkLabs is made, you can read whether semi-permanent tattoos are safe and what our ink contains.
Getting a tattoo isn't risk-free, but these are risks you can understand and, to a large extent, reduce: infection and allergy depend mostly on the studio and the ink, while the question about cancer remains open, based on a single study with a statistically weak result, not on a proven relationship. With that information, you can choose an authorized studio, ask the right questions about the ink and sterilization, and know when it's best to consult a doctor. If what you're still deciding is the design or exact placement, this guide to choosing the design and placement of your first tattoo can help you take that step calmly.
