Disclaimer:
The information provided in this blog is for general informational purposes only and is not intended as, nor should it be considered a substitute for, professional medical advice, diagnosis, or treatment. The content may reference third-party research or studies and does not necessarily reflect the views or opinions of Salus Saunas. No content on this site should be interpreted as a recommendation for any specific treatment or health-related action. Always consult with a licensed healthcare provider before using a sauna or making any changes to your health or wellness routine. Salus Saunas disclaims any liability for decisions made based on the information presented in this blog.
Some days the pain sits in your shoulders and neck. Other days it seems to be everywhere at once, and the fatigue arrives before you've finished your morning coffee. If you live with fibromyalgia, you've probably noticed that warmth can feel like relief: a hot shower, a heating pad, a warm bath at the end of a long day. So it's natural to wonder whether a sauna could do the same thing, only more. And if you've ever overdone a good day and paid for it with a flare, you may also wonder whether a hot room is one more thing that could backfire.
Fibromyalgia is a chronic disorder that causes pain and tenderness throughout the body, along with fatigue and trouble sleeping, as the National Institute of Arthritis and Musculoskeletal and Skin Diseases explains. This article looks at what the research actually shows about heat therapy and fibromyalgia, why pacing matters as much as temperature, how a careful first session might look, and who should check with a doctor before stepping into any sauna.
What Fibromyalgia Does to Pain, Sleep, and Temperature
Fibromyalgia isn't only about pain. MedlinePlus lists long-lasting pain and stiffness throughout the body, fatigue, and trouble sleeping as the main symptoms, along with memory and concentration problems and heightened sensitivity to light, noise, smells, and temperature. There is no cure, so treatment focuses on relieving symptoms.
That temperature sensitivity is the detail that matters most here. Some people with fibromyalgia find warmth soothing and cold hard to tolerate; others find that strong heat leaves them drained. Both experiences are common, and neither is a reason to assume a sauna will help or hurt you. It's a reason to approach heat the same way you approach everything else with fibromyalgia: in small, measured steps, paying attention to how your body answers.
What the Research Says About Heat and Fibromyalgia
The most direct evidence comes from a small Japanese study of what researchers call Waon therapy, or "soothing warmth therapy." Thirteen women with fibromyalgia sat or lay in a far infrared dry sauna kept at 60°C (140°F) for 15 minutes, then rested under a blanket for 30 minutes to stay warm. According to the study published in Internal Medicine, all of them reported a significant reduction in pain after the first session, roughly by half, and the effect became stable after 10 treatments.
A larger trial adds some weight. In a randomized controlled study of 139 patients at a German rehabilitation hospital, adding mild near infrared whole-body hyperthermia to a standard rehabilitation program twice a week for three weeks reduced pain more than rehabilitation alone, with patients followed for six months afterward. Side effects appeared in 20% of the heat group, though all of them disappeared in under 30 minutes. Neither study used a home sauna, and the first had no control group, so the honest summary is promising but early.
Warm Water, Heat, and the Bigger Evidence Picture
Researchers have studied warm-water treatments for fibromyalgia more often than saunas. A systematic review and meta-analysis in Arthritis Research & Therapy found moderate-to-strong evidence that hydrotherapy brings a small reduction in pain and a small improvement in quality of life at the end of treatment. Bathing in mineral or thermal water showed larger effects, but those studies were fewer and at higher risk of bias, and the authors called for larger, high-quality trials.
It also helps to see where heat sits among other options. The EULAR recommendations for managing fibromyalgia, built from 107 systematic reviews and meta-analyses, give exercise the only "strong for" rating among therapies, and note that the size of effect for most treatments is relatively modest. In other words, a sauna is best thought of as a possible comfort tool alongside movement, sleep, and your medical care, not a replacement for them.
Why Pacing Matters More Than Temperature
Anyone with fibromyalgia knows the pattern: you feel good, you do a lot, and a day or two later you pay for it. MedlinePlus puts it plainly in its self-care advice: learn to pace yourself, because doing too much can make your symptoms worse. It also advises starting new activity slowly and increasing it gradually.
Sauna sessions deserve the same treatment. Heat asks something of your body: your heart rate rises, you sweat, and you lose fluid. On a good day, a long, hot session can feel wonderful while you're in it and still leave you wiped out that evening. The American College of Rheumatology recommends being gentle with yourself as you start any new exercise, and that's a useful mindset for heat too. Begin with less than you think you can handle, and count the next day's energy as part of the result.
A Gentle First-Session Plan
If your doctor agrees, start low and short. The Waon protocol is a helpful reference point: a dry heat around 140°F for 15 minutes, followed by quiet rest while staying warm. You don't need to match it exactly, and many people begin with less. Harvard Health recommends staying in no more than 15 to 20 minutes, drinking two to four glasses of cool water afterward, and skipping alcohol before and after.
Sit rather than stand, keep a towel and water within reach, and leave the door unlocked so you can step out the second you want to. Afterward, give yourself the rest period instead of rushing into chores. Try two or three sessions a week at first, on days you'd otherwise call manageable, rather than saving the sauna for your worst flare days. That way you learn how your body responds before you rely on it.
Who Should Talk to a Doctor First
Many medicines used for fibromyalgia and its related symptoms can change how your body handles heat. The CDC’s guidance on heat and medications lists SSRIs, SNRIs, tricyclic antidepressants, anticonvulsants, and some pain relievers among the drug classes that can contribute to heat sensitivity, through effects such as sedation, reduced thirst, impaired sweating, or low blood pressure. If you take any of these, ask your prescriber how sauna heat fits with your treatment.
Talk to your doctor first as well if you have heart disease, high or low blood pressure, a history of fainting, or another condition alongside fibromyalgia, such as lupus or rheumatoid arthritis. Harvard Health specifically advises people with uncontrolled high blood pressure or heart disease to check with their doctors before taking a sauna, and to avoid the sauna when ill.
Tracking Sessions and Knowing When to Stop
A simple log turns guesswork into information. Write down the temperature, session length, how you felt during the session, that evening, and the next morning, along with your sleep and pain level. After a few weeks, patterns show up: maybe 12 minutes leaves you relaxed while 20 minutes costs you the next day. That log is also the most useful thing you can bring to your next appointment.
Step out right away if you feel dizzy, nauseated, or unusually weak. These are among the warning signs of heat exhaustion the CDC’s National Institute for Occupational Safety and Health lists, along with headache, heavy sweating, and irritability. Cool down slowly in a comfortable room, sip water, and don't drive until you feel steady. If symptoms don't settle quickly, get medical help.
Why a Home Sauna Fits a Pacing Plan
Pacing is hard to do in someone else's sauna. At a gym or spa, the temperature is set for the room, not for you. You may feel pressure to stay as long as the person next to you, the walk to the parking lot comes right after, and the trip itself uses up energy before you've even warmed up. On a low-energy day, that's often enough to make you skip it altogether.
At home, the session fits around you. You choose the temperature, stop at eight minutes if that's all you want, and lie down on your own couch afterward. You can also make the sauna part of a calm evening routine, which matters because sleep is one of the hardest parts of fibromyalgia. The American College of Rheumatology suggests setting healthy sleep habits, including going to bed at the same time each night.
A Free Guide Before You Choose
Choosing a sauna with fibromyalgia in mind comes down to a few practical questions: infrared or traditional heat, how hot you actually want it, whether you'll sit upright or want room to stretch out, and where it will fit in your home.
Our free Home Sauna Buyer’s Guide walks through sauna types, temperature ranges, sizing, and electrical requirements, so you can narrow your options before you talk it over with your doctor. The EULAR recommendations encourage shared decision-making between patients and their care teams, and walking into that conversation with a specific plan in mind makes it far more productive.
A Far Infrared Sauna for Low, Steady Heat
If the Waon research is what caught your attention, a far infrared sauna is the closest match at home. The Laurel King Far Infrared Indoor Sauna uses six carbon far infrared heating elements, listed as near-zero EMF, and has a maximum setting of 150°F. It typically reaches 135°F to 140°F, depending on the room, which puts it right around the 140°F used in the Waon study. You can also set it lower on days you want gentler heat.
It's a two-person infrared sauna built from natural hemlock, with an interior of 40 by 35 inches and 67 inches tall, so one person can sit comfortably with room to shift positions. It runs on a standard 120-volt, 15-amp dedicated circuit, so there's no 240-volt project, though you may need an electrician to confirm the dedicated receptacle. It has interior and exterior LED controls, chromotherapy lighting with a red light feature, a roof vent, Bluetooth and FM audio, and a five-year warranty.
Explore other sizes and price points:
Prices shown reflect pricing on the date this article was published. Contact us for current pricing and more information.
You're Far From Alone
If you've hesitated to ask about saunas because of fibromyalgia, you're in large company. The National Center for Complementary and Integrative Health estimates that 5 million American adults have fibromyalgia, and that 80 to 90 percent of them are women. The American College of Rheumatology puts it at 2 to 4 percent of people.
That's a lot of people weighing the same questions about heat, energy, and flares. It's also why we'd rather give you the full picture, including the limits of the research, than a promise. The studies above suggest heat may ease pain for some people with fibromyalgia, but responses vary. A few weeks of short, careful sessions, reviewed with your doctor, will tell you more about your own body than any study can.
What It Costs and How Much Room You Need
The Laurel King is $5,995, with other infrared, traditional, and hybrid options in the carousel above starting at $3,195. Its exterior measures 46 by 40 inches, plus about 4 inches of roof overhang, so it takes up roughly 13 square feet of floor space in a spare room, bedroom corner, or finished basement. Because it's for indoor use only, plan for a room that stays near a normal indoor temperature, around 70°F, so it heats up well.
Salus Saunas works with Affirm and Synchrony, with Synchrony currently offering financing starting at 0% APR over 18 months for qualified buyers, roughly $333 a month for the Laurel King over that term before any down payment. Ask whether an offer is true zero-interest or deferred interest before signing. Salus also partners with Truemed, which determines individual HSA and FSA eligibility through a health survey; for the general rules on qualifying medical expenses, see IRS Publication 502.
Warmth, Taken at Your Own Pace
Fibromyalgia doesn't have to rule out sauna bathing, but it does change how you approach it. Small studies of infrared and whole-body heat suggest real pain relief for some people, while larger reviews remind us that the effects are modest and that exercise remains the best-supported treatment. Talk to your doctor, especially about your medications, start short and low, rest afterward, and let your own log guide you. As MedlinePlus reminds readers, pacing yourself is part of the treatment.
If you'd like help finding a sauna that lets you set gentle, steady heat on your own schedule, our sauna specialists can walk you through our infrared and traditional lines, ideally after you've talked with your doctor about whether a sauna fits your fibromyalgia plan.
Frequently Asked Questions About Saunas and Fibromyalgia
1. Can a sauna help fibromyalgia pain?
It may help some people. In a small study of far infrared sauna therapy, 13 women with fibromyalgia reported a significant drop in pain after the first session, but larger controlled trials are still needed.
2. Is infrared or traditional sauna better for fibromyalgia?
Most of the research used infrared heat. The Waon study used a far infrared dry sauna at 140°F, and a randomized trial used near infrared whole-body heat; traditional saunas haven't been studied as directly.
3. How long should a sauna session be with fibromyalgia?
Start short. The research protocol used 15 minutes, and Harvard Health recommends no more than 15 to 20 minutes for anyone; many people with fibromyalgia begin with less.
4. Can a sauna trigger a fibromyalgia flare?
Overdoing any activity can. MedlinePlus notes that doing too much can make symptoms worse, so keep early sessions brief and watch how you feel the next day.
5. Do fibromyalgia medications affect heat tolerance?
Some can. The CDC lists SSRIs, SNRIs, tricyclic antidepressants, and anticonvulsants among drug classes that can contribute to heat sensitivity. Ask your prescriber before starting.
6. Has warm water therapy been studied for fibromyalgia?
Yes, more often than saunas. A meta-analysis found a small reduction in pain and a small improvement in quality of life with hydrotherapy for fibromyalgia.
7. Can a sauna replace exercise for fibromyalgia?
No. The EULAR recommendations rate exercise as the only therapy with a "strong for" recommendation; heat is best used alongside movement, not instead of it.
8. What should I do after a sauna session?
Rest. The Waon protocol included 30 minutes under a blanket after the heat, and Harvard Health suggests drinking two to four glasses of cool water.
9. When should I stop a session right away?
Leave the sauna if you feel dizzy, weak, nauseated, or get a headache. The CDC lists these among the warning signs of heat exhaustion.
10. How common is fibromyalgia?
The NCCIH estimates that about 5 million American adults have fibromyalgia, and that 80 to 90 percent of them are women.
