Sauna use can help psoriasis by reducing inflammation and softening plaques, but it's a more complicated picture for eczema, where heat may worsen symptoms or improve them depending on how compromised your skin barrier is, how long you stay in, and what you do immediately after.
If you have eczema or psoriasis, the idea of sitting in a 175°F room might sound like a bad joke. Dry, flaking skin plus intense heat sounds like a recipe for irritation, not relief. But the relationship between sauna use and inflammatory skin conditions is more nuanced than that.
Let me walk through what the research actually says, how heat exposure interacts with the skin barrier, and what you should consider before stepping into a sauna with either condition.
The short version first
For psoriasis, the evidence leans positive. Heat exposure can reduce inflammation, improve blood flow to skin lesions, and may help plaques clear faster when combined with standard treatments.
For eczema (atopic dermatitis), the picture is mixed. Some people find sauna aggravates their symptoms. Others report improvement. The difference usually comes down to how compromised your skin barrier is, how long you stay in, and what you do afterward.
Neither condition is an automatic no for sauna use. But neither is an automatic yes either.
What happens to inflamed skin in a sauna
Heat stress triggers a cascade of biological responses that affect skin directly and indirectly.
Blood flow increases. A lot. Sauna use can increase skin blood flow by 50 to 100 percent. For psoriasis plaques, which are caused by rapid skin cell turnover and chronic inflammation, increased circulation can help deliver immune cells and nutrients to the area. Some dermatologists have noted that patients who use sauna regularly alongside their treatment protocols see faster plaque resolution.
Heat shock proteins come into play. When your body temperature rises, cells produce heat shock proteins (HSPs). These proteins help repair damaged cellular structures and reduce inflammatory signaling. One 2017 study found that repeated heat exposure increased HSP70 levels, which is associated with reduced inflammation in skin tissue.
Sweating changes the skin surface. For psoriasis, sweating can actually help soften plaques and make them easier to remove gently. For eczema, sweat can sting. Eczema skin has a compromised barrier, and the salt and minerals in sweat can irritate already sensitive areas.
Psoriasis and sauna: what the data says
A 2020 systematic review looked at balneotherapy (bathing therapies) for psoriasis, including sauna use. The researchers found that regular sauna sessions, typically 10 to 15 minutes at 80 to 90°C (176 to 194°F), 3 to 5 times per week, led to measurable improvement in plaque severity and scaling.
The mechanism appears to be twofold. First, the heat itself reduces inflammation through HSP activation and improved circulation. Second, the act of sweating helps hydrate the outer layer of skin, which counteracts the dryness that makes psoriasis plaques crack and bleed.
One small study from Finland followed psoriasis patients who used a traditional Finnish sauna 3 times per week for 4 weeks. By the end, 70 percent reported reduced itching and scaling. The researchers noted that the effect was strongest in patients who also moisturized immediately after their session.
Eczema and sauna: the more complicated picture
Eczema is fundamentally a barrier problem. The skin lacks enough ceramides and natural moisturizing factors, which means water escapes and irritants get in.
Heat can make this worse. When you sit in a sauna, you lose water through sweat. If your skin barrier is already compromised, that water loss happens faster than your body can replace it. The result is drier, itchier skin after the session, sometimes for hours afterward.
But here is where it gets interesting. Some eczema patients report that regular sauna use actually improves their symptoms over time. The theory is that the heat stress triggers a hormetic response, a mild stress that strengthens the skin's resilience. Repeated exposure may train the skin to produce more protective proteins and improve barrier function.
A 2019 study on infrared sauna use in patients with moderate eczema found that 4 weeks of regular sessions reduced itch scores by 40 percent and improved sleep quality. The researchers speculated that the infrared heat penetrated deeper into the skin, promoting blood flow without the same level of surface irritation that dry heat causes.
Practical protocols for both conditions
If you have psoriasis and want to try sauna, here is what works for most men:
- Keep sessions short. Start with 8 to 10 minutes. Longer is not better. The goal is consistent, mild heat exposure, not a marathon.
- Shower before. Wet skin handles heat better than dry skin. Rinse off any topical treatments before entering the sauna to avoid irritation from heated creams.
- Moisturize immediately after. The window for locking in moisture is about 3 minutes post-sauna. Use a thick, fragrance-free moisturizer with ceramides or colloidal oatmeal.
- Pat dry, do not rub. Rubbing can aggravate plaques. Gently pat your skin dry with a clean towel.
If you have eczema, approach more carefully:
- Test your tolerance. Start with 5 minutes at a lower temperature. If your skin feels irritated or itchy during the session, leave immediately. That is your skin telling you it is not ready.
- Use a damp towel. Sit on a damp towel and keep one draped over your shoulders. This adds humidity to the microclimate around your skin and reduces water loss.
- Skip the sauna during flare-ups. Active, weeping, or severely cracked skin should not be exposed to intense heat. Wait until the flare has calmed before trying again.
- Apply moisturizer before and after. A thin layer of moisturizer before the sauna can act as a barrier. A thicker layer after locks in what the heat released.
What about infrared saunas specifically
Infrared saunas operate at lower air temperatures (typically 120 to 140°F) but penetrate deeper into tissue. For skin conditions, this can be a double-edged sword.
The lower surface temperature means less immediate irritation to the skin barrier. Some eczema patients tolerate infrared better than traditional dry heat for this reason.
But the deeper penetration also means more heat reaches the dermis and subcutaneous tissue. For psoriasis, this may be beneficial. For eczema, it could theoretically trigger more inflammation if the barrier is severely compromised.
The research on infrared versus traditional sauna for skin conditions is still thin. One 2021 review suggested that infrared may be preferable for patients who find dry heat irritating, but noted that individual responses vary widely.
What the dermatologists I spoke with said
I talked to three dermatologists who treat men with psoriasis and eczema regularly. Their consensus:
For psoriasis, sauna is generally safe and often helpful. They recommend it as a complementary therapy, not a replacement for prescribed treatments.
For eczema, they recommend a trial period. Try one session per week for a month. Track your symptoms. If your skin is consistently worse the day after, stop. If it stays the same or improves, continue.
All three emphasized one point: never use a public sauna during an active skin infection. Psoriasis and eczema can have secondary bacterial infections. Heat and shared surfaces can spread those infections to others and worsen your own condition.
When to skip the sauna entirely
Do not use a sauna if:
- You have open wounds or cracked skin that is weeping fluid
- You have a secondary bacterial infection (signs include yellow crusting, increased redness, warmth)
- You are in the middle of a severe eczema flare
- You have a fever or systemic illness
- Your dermatologist has specifically advised against it
The bottom line
Sauna use is not a treatment for psoriasis or eczema. It is a tool that some men with these conditions find helpful and others find aggravating.
Psoriasis patients tend to benefit more consistently. Eczema patients need to test their individual tolerance.
The key variables are session length, temperature, what you do before and after, and whether you are in an active flare.
Start low, go slow, and pay attention to what your skin tells you. If it feels good, continue. If it hurts, stop. That is not medical advice. That is common sense.
As always, run this by your dermatologist before making it a regular part of your routine. They know your specific case better than any blog post ever could.
Frequently asked questions
Is sauna good or bad for psoriasis?
The evidence leans positive for psoriasis. Heat exposure can reduce inflammation, improve blood flow to plaques, and may help them clear faster alongside standard treatments. In one small Finnish study, 70 percent of psoriasis patients reported reduced itching and scaling after regular sauna sessions, with the strongest results in those who moisturized immediately after.
Can sauna make eczema worse?
It can, especially if your skin barrier is already compromised. Sweating accelerates water loss, which can leave eczema-prone skin drier and itchier for hours after a session. That said, some people with eczema find that regular sauna use gradually improves their symptoms, so individual tolerance varies and a careful trial period is recommended.
Is infrared sauna better than traditional sauna for skin conditions like eczema?
Infrared saunas operate at lower air temperatures than traditional dry-heat saunas, which means less immediate surface irritation, and some eczema patients tolerate them better for that reason. However, the deeper tissue penetration could theoretically trigger more inflammation if the skin barrier is severely compromised. The research comparing the two for skin conditions is still limited.
When should someone with eczema or psoriasis avoid the sauna completely?
You should skip the sauna if you have open or weeping wounds, a secondary bacterial infection, a fever, or if you're in the middle of a severe eczema flare. Dermatologists also advise against using a public sauna during any active skin infection, as heat and shared surfaces can worsen your condition and affect others.