THERAPIES & TRADITIONS · GUIDE
Sauna vs Steam Room
A plain, no-winner comparison of saunas and steam rooms: how they differ, what research exists for each, shared safety points and who should check with a clinician first.
Content last updated . This page has not been medically reviewed.
Back to HydrotherapySafety first. Both are very warm rooms. If you feel faint, dizzy, short of breath, or have chest pain, leave and get help (in the US, call 911). Alcohol and heat together are a known danger. [1]
Side by Side
| Question | Traditional sauna | Steam room |
|---|---|---|
| What it is | Hot, dry air | Hot, humid air |
| Human research | One systematic review found 40 clinical studies, only 13 of them randomized trials, most small [2]; one large Finnish cohort of middle-aged men [3] | Proper evidence not found |
| Heart and blood vessels | In that cohort, more frequent sauna use was associated with lower risk of sudden cardiac death; the authors called for more study of why [3]. A later review called the evidence uncertain [4] | Proper evidence not found |
| Risks described | Fainting [5]; with alcohol, low blood pressure, arrhythmia and sudden death [1], and dehydration [4] | Not described in the sources we read |
| Evidence label | Promising but limited (observational) | Insufficient evidence |
What Humidity Changes
Humidity changes how heat feels and how easily sweat can evaporate. A Finnish forensic case report described a healthy man who died of extensive hot-air burns in a sauna; the authors concluded that, apart from the high temperature, the high relative humidity most probably contributed. [6] That is one rare case, not a rule about steam rooms. No trial comparing sauna and steam-room health outcomes was found.Going Deeper
- Sauna evidence is owned by the Biohacking section: Sauna evidence summary.
- Steam rooms and hygiene: Steam rooms and steam baths.
- Overview of both: Saunas and steam rooms.
Which Should I Choose?
Choose by comfort, access, hygiene and your clinician's advice, not by health claims. Neither is a treatment. If heart health is the question, the only long-term outcome data are for saunas, and they show association, not proof. [3][4]Frequently asked questions
Is a sauna or a steam room better for you?
No source we read shows one is better. Sauna research is larger but mostly observational. [3][4] For steam rooms, proper evidence not found.
Is a steam room good for skin or lungs?
Proper evidence not found. We searched PubMed for "steam room" in titles and abstracts and found no health-outcome studies.
Can I use both in one visit?
Ask your clinician if you have heart or blood pressure issues. Leave if you feel dizzy or unwell, and do not combine with alcohol. [1][5]
Are either safe in pregnancy?
Sauna and hot tub sources differ in focus, so ask your prenatal clinician. One review reported that sauna bathing is safe in uncomplicated pregnancies of healthy women. [1] Another warned that hot tub use in early pregnancy can raise core temperature to risky levels. [8]
Do either detoxify the body?
Not shown in the sources we read. See the detox claim check.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Shared Safety Points
- A medical review states that alcohol in a sauna raises the risk of low blood pressure, arrhythmia and sudden death. [1]
- The NHS lists being too hot, heart problems and drinking too much alcohol among the causes of fainting. [5]
- The same review lists unstable angina, a recent heart attack and severe aortic stenosis as contraindications to sauna bathing. [1]
- A 2026 review of heat therapies found short-lived drops in blood pressure and said safety margins for frail older adults and people taking beta-blockers are not well defined. [7]
No time or temperature limit is given here, because suitable limits depend on the person. Ask a clinician first if you have a heart or blood pressure condition, take blood pressure medicine or are pregnant. See the Hydrotherapy safety guide and heat illness and dehydration.
References
- Hannuksela ML, Ellahham S. Benefits and risks of sauna bathing. Am J Med (2001). PubMed record. Read 2026-10-22.
- Systematic review of sauna bathing and health. PubMed record. Read 2026-10-22.
- Laukkanen T et al. Association between sauna bathing and fatal cardiovascular and all-cause mortality events. JAMA Intern Med (2015). PubMed record. Read 2026-10-22.
- Sauna bathing and sudden cardiac death review. PubMed record. Read 2026-10-22.
- NHS. Fainting. Read 2026-10-22.
- Lindroos K, Keltanen T. Sudden death in sauna due to fatal burns: a case report. Am J Forensic Med Pathol (2016). PubMed record. Read 2026-10-22.
- Yamasaki S et al. Acute blood pressure responses and safety considerations in heat therapy interventions: a narrative review. Complement Ther Med (2026). PubMed record. Read 2026-10-22.
- Chambers CD. Risks of hyperthermia associated with hot tub or spa use by pregnant women. Birth Defects Res A (2006). PubMed record. Read 2026-10-22.