Can Infrared Saunas Cause Cancer? What the Research Actually Says
Infrared saunas have grown in popularity as a home wellness tool — valued for relaxation, recovery support, and the comfort of a consistent daily practice. But with increased interest comes an important question: Can infrared saunas cause cancer?
Let’s break down the science, clear up myths, and explain what current research really says.
What Is an Infrared Sauna?
Unlike traditional saunas that warm the air around you, infrared saunas heat your body directly using invisible wavelengths of light on the electromagnetic spectrum. The primary types of infrared used are:
Near-Infrared (NIR): 0.7–1.4 μm — penetrates the skin surface
Mid-Infrared (MIR): 1.4–3.0 μm — reaches deeper into tissues
Far-Infrared (FIR): 3.0–100 μm — absorbed efficiently by the body
This direct heating effect allows for lower ambient temperatures, typically 110–140°F (43–60°C), creating a more comfortable experience than traditional saunas which heat the air to 150–195°F (65–90°C).
Read more: Far Infrared Sauna: Benefits, How It Works, and What to Know
Do Infrared Saunas Emit UV Rays?
No. Infrared light is not the same as ultraviolet (UV) radiation. While UV light has shorter wavelengths that can damage DNA and cause skin cancer, infrared light has longer, non-ionizing wavelengths that do not carry enough energy to cause cellular mutations.
According to the International Commission on Non-Ionizing Radiation Protection (ICNIRP), typical sauna use does not cause skin cancer. However, long-term, high-temperature exposure can lead to minor conditions like erythema ab igne (a form of skin irritation) — not cancer³.
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What Do Studies Show About Infrared Radiation and Cancer Risk?
No Direct Link to Cancer: Research shows that infrared radiation doesn’t alter DNA the way UV rays do. Therefore, it does not directly cause skin cancer or other forms of cancer⁴.
Heat vs. Radiation Risk: Most reported risks from infrared sauna use relate to overheating or skin dehydration, not carcinogenic effects.
Research context: Some clinical research has explored infrared sauna use in wellness contexts alongside conventional care — this is distinct from using it as a treatment for any condition.
“Skin cancer is not expected from exposure to infrared radiation.” – ICNIRP³
Infrared Sauna Side Effects to Be Aware Of
While infrared saunas are generally safe, side effects can occur with excessive or improper use:
Dehydration
Overheating
Dry skin
Eye strain (from intense NIR emitters)
To stay safe, follow these tips:
Limit sessions to 15–30 minutes
Stay hydrated before, during, and after
Use eye protection if you’re in a near-infrared unit
Start slow if you’re new to infrared sauna therapy
Learn How hot a sauna should be for optimal results.
What the Research Actually Explores
Beyond the cancer question, a broader body of research has explored what consistent sauna use is associated with over time. The most cited work — a Finnish longitudinal study published in JAMA Internal Medicine — followed over 2,000 men for 20 years and found associations between sauna frequency and various cardiovascular markers. The study observed associations, not causation, and the mechanisms are still being studied.
Separately, research on red and near-infrared light (photobiomodulation) has explored cellular energy effects — specifically how certain wavelengths interact with mitochondria to support ATP production. This is a distinct mechanism from infrared heat and is covered in detail in our guide to red light therapy in infrared saunas.
What the research supports as a general statement: consistent sauna practice is associated with positive long-term wellness markers in healthy adults. It is not a treatment for any condition and should not be used as one.
Can Infrared Saunas Cause Skin Cancer?
Let’s return to the key question: can infrared saunas cause cancer?
Based on current science, the answer is no. Unlike UV rays, infrared light does not damage DNA or promote cancerous mutations in the skin. In fact, the primary concern with excessive infrared exposure is thermal stress—not carcinogenic risk³.
That said, moderation matters. Prolonged or repeated high-heat exposure can irritate skin or eyes, especially with intense near-infrared wavelengths. This is why reputable sauna brands regulate both wavelength and heat output for safety.
Still Curious About Saunas? Grab the Buyer’s Guide.
Whether you’re comparing sauna types or weighing health benefits, our Sauna Buyer’s Guide breaks it all down—so you can shop smarter.
Frequently Asked Questions
Can infrared saunas cause cancer?
No. Infrared light is non-ionising radiation — it does not carry enough energy to damage DNA or cause cellular mutations. This is fundamentally different from UV radiation, which is associated with skin cancer. Current scientific consensus, including guidance from the International Commission on Non-Ionizing Radiation Protection (ICNIRP), does not identify infrared sauna use as a cancer risk.
Is infrared radiation the same as UV radiation?
No. UV (ultraviolet) radiation has shorter, higher-energy wavelengths that can damage DNA — this is what causes sunburn and increases skin cancer risk. Infrared radiation has longer, lower-energy wavelengths that produce heat rather than ionisation. Both are invisible to the human eye but sit on opposite sides of visible light on the electromagnetic spectrum — UV at the short-wavelength end, infrared at the long-wavelength end — and have very different biological effects.
Are infrared saunas safe for regular use?
Yes, for most healthy adults when used as directed. The main risks from infrared sauna use are dehydration and overheating — both manageable with proper hydration and reasonable session lengths. If you have active health conditions, check with your healthcare provider before starting a regular sauna practice.
Do infrared saunas emit EMF radiation?
All electrical devices emit some level of electromagnetic field (EMF). Quality infrared sauna manufacturers publish measured EMF levels at typical user distances. Low-EMF models are designed to minimise electrical field exposure, which is a separate consideration from the infrared light itself. Look for published test data rather than marketing claims when evaluating EMF levels.
Responsible Use and Final Thoughts
They offer a non-invasive way to warm your body, support circulation, reduce stress, and contribute to a consistent wellness practice.
Still, as with any wellness tool, listen to your body, consult your doctor if you have concerns, and ensure your sauna complies with safety standards.
Bottom line: There’s no scientific evidence that infrared saunas cause cancer².
Disclaimer
At Body Wellness Club, we’re committed to providing science-backed insights and clean wellness tools to support your journey toward better health. Our content is intended for informational and educational purposes only and is not a substitute for personalized medical advice, diagnosis, or treatment.
Please consult with a licensed healthcare provider before making any decisions related to your health, supplements, or treatment plans. If you are experiencing a medical condition or emergency, seek professional care immediately.
Body Wellness Club and its contributors are not liable for any outcomes resulting from the use—or misuse—of information on this site. While we aim to keep all content accurate and up to date, we cannot guarantee it is free of errors or omissions.
Your wellness is personal. Make choices that reflect what’s right for you.
Sources
Mayo Clinic. Are Infrared Saunas Safe? [Internet]. Mayo Clinic. Available from: https://www.mayoclinic.org/healthy-lifestyle/consumer-health/expert-answers/infrared-sauna/faq-20057954
Penn Dermatology Specialists. Do Infrared Saunas Cause Skin Cancer? What You Need to Know [Internet]. 2023. Available from: https://www.penndermspecialists.com/do-infrared-saunas-cause-skin-cancer-what-you-need-to-know/
International Commission on Non-Ionizing Radiation Protection (ICNIRP). Biological effects of infrared radiation [Internet]. 2006. Available from: https://hps.org/publicinformation/ate/q10677.html
HighKey Balance. Common Misconceptions About Infrared Sauna Therapy [Internet]. 2022. Available from: https://www.highkeybalance.com/common-misconceptions-about-infrared-sauna-therapy/
Shah J, Thomsen S, Milner TE, Emelianov SY. Ultrasound guidance and monitoring of laser-based fat removal. Lasers Surg Med. 2008;40(10):680–7. Available from: https://doi.org/10.1002/lsm.20726
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