Does a sauna help with a cold?

A sauna may make a mild cold feel better for a short time by loosening congestion and helping you relax, but it does not cure a cold or shorten it reliably. A Cochrane review of heated, humidified air found no clear benefit on symptoms or virus levels. Rest and fluids remain the main treatment.

Should you use a sauna with a fever?

No. Skip the sauna if you have a fever, body aches, chills or flu-like illness. Your body is already working to regulate temperature, and adding heat raises the risk of dehydration, dizziness and fainting. Harvard Health and Cleveland Clinic both advise against sauna use while ill or feverish.

Is a sauna good for a head cold?

A short, gentle sauna session can be reasonable with a mild head cold, meaning symptoms only above the neck such as a runny or stuffy nose and mild sore throat, with no fever. Keep it to 5-10 minutes at a lower temperature, drink extra water and stop if you feel worse.

Is a steam room or dry sauna better for congestion?

Many people find moist heat more soothing for a stuffy nose, so a steam room or a traditional sauna with water on the rocks may feel better than very dry air. The relief is temporary. Very dry, hot air can irritate an already sore throat, so breathe through a towel or lower the temperature if needed.

Is an infrared sauna good for a cold?

There is no evidence that an infrared sauna treats a cold. Infrared cabins run cooler, around 110-135°F (43-57°C), which some people find easier to tolerate when congested. The same rules apply: no sauna with a fever, keep sessions short, hydrate well and stay home from shared facilities while contagious.

Can regular saunas help prevent colds?

Possibly, but the evidence is thin. A small 1990 controlled trial of 50 adults found regular sauna users had fewer colds over six months. A Finnish cohort of 1,935 men linked frequent sauna use with lower rates of respiratory disease. Neither design proves that saunas prevent colds.

Is a Sauna Good for a Cold? What to Know First

Short answer. Is sauna good for a cold? It is not a cure, and research has not shown that it shortens one. With a mild head cold and no fever, a short, gentle session may ease congestion and help you relax, as long as you drink extra water. If you have a fever, chest symptoms, body aches or the flu, skip the sauna until you have recovered.

Is sauna good for a cold? What the research says

There are two different questions here: does a sauna help once you already have a cold, and does regular sauna use help prevent colds? The evidence for both is limited.

Treating a cold that has already started

The closest research looks at breathing warm, moist air, which is part of what happens in a sauna or steam room. A 2017 Cochrane review, Heated, humidified air for the common cold, pooled small trials and found:

No clear effect on persistent cold symptoms (the result depended on the statistical model and the evidence was rated low quality).
No significant benefit on how much people felt the treatment helped.
No clear effect on the amount of cold virus in nasal washes.
More reported side effects, such as nose discomfort, in the heated air groups.

That matters for the popular idea of using a sauna to "sweat out" or "kill" a cold virus. Sauna heat raises your skin and core temperature somewhat, but the Cochrane data give no sign that it clears the virus faster. Any relief is about comfort, not cure.

Preventing colds with regular sauna use

Two studies are often quoted:

Study	Who	Design	Finding	Limits
Ernst et al., 1990	50 adults (25 sauna, 25 control)	Controlled, not randomized, 6 months	Sauna group had fewer colds, about half as many in the last 3 months; no difference in duration or severity	Small, not randomized, no objective endpoints
Kunutsor et al., 2017	1,935 Finnish men aged 42-61	Observational cohort, median 25.6 years	2-3 sessions a week linked to 27% lower risk of respiratory disease; 4+ sessions to 41% lower	Observational; shows association, not cause; men only

The 1990 trial is described by its own lead author as small and in need of confirmation. The Finnish cohort covered respiratory disease broadly, including pneumonia, not the common cold specifically. People who sauna often may also differ in fitness and lifestyle. For the bigger picture, see our guide to sauna benefits.

When is it OK to use a sauna with a cold?

A useful rule comes from exercise guidance. Mayo Clinic's "above the neck" rule says light activity is usually fine when symptoms are limited to a runny or stuffy nose, sneezing or a mild sore throat, but not with chest congestion, a hacking cough, fever, body aches or stomach upset. The same logic works well for a sauna, which also raises heart rate and fluid loss.

Your symptoms	Sauna?	Why
Runny or stuffy nose, sneezing, no fever	Short, gentle session is usually OK	Warm air may feel soothing; keep it brief
Mild sore throat only	Use caution	Dry heat can irritate; try lower heat or more humidity
Chest congestion or persistent cough	Skip it	"Below the neck" symptoms suggest a more significant infection
Fever, chills, body aches	No	Extra heat strain, higher risk of dehydration and fainting
Flu (influenza), COVID-19 or similar	No	Rest at home; avoid shared spaces while contagious
Vomiting or diarrhea	No	High risk of dehydration

Harvard Health advises against using a sauna while ill, and Cleveland Clinic specifically says to avoid saunas during a fever or infections such as the flu.

Why a sauna with a fever is a bad idea

A fever means your body has already raised its temperature set point. Sitting in 150-195°F (66-91°C) air, or even a 120°F (49°C) infrared cabin, adds more heat on top of that. You also lose fluid through sweating at a time when illness may already be reducing what you eat and drink.

The likely results are dizziness, a racing heart, headache and, in the worst case, fainting. Are saunas dangerous in general? For healthy adults who follow sensible limits, no. A sauna with a fever is one of the situations where the risk clearly outweighs any comfort. Wait until you have gone at least 24 hours without fever and without fever-reducing medicine, which matches the CDC's guidance on returning to normal activities.

Sauna for congestion, sore throat and cough

Congestion

Warm, moist air is what many people reach for with a blocked nose. The CDC's cold treatment advice suggests a clean humidifier or breathing steam from hot water or a shower. A sauna with a little water on the stones gives a similar warm, humid feel, and some people find it easier to breathe for a while afterward.

Sore throat

Can a sauna cause a sore throat? Very hot, dry air can dry out the throat and nose, so some people notice a scratchy throat after a sauna even when they are well. If your throat is already sore, keep the temperature lower, add a ladle of water for humidity, or breathe through a damp towel. A steam room sore throat is less common because the air is saturated, but the heat can still feel harsh.

Cough

A dry tickle from a cold is not a reason to avoid a gentle session. A deep, chesty or persistent cough is. That falls under "below the neck" symptoms, and you should also avoid shared saunas while coughing to protect other users.

Steam room, traditional or infrared: which is better with a cold?

Option	Typical temperature	Humidity	With a mild cold
Traditional (Finnish) sauna	150-195°F (66-91°C)	Low; rises when water hits the stones	Lower the heat; add water for humidity
Infrared sauna	110-135°F (43-57°C)	Low	Easier to tolerate; dry air may irritate the throat
Steam room	About 110-120°F (43-49°C)	Near 100%	Often feels best for congestion; shared rooms spread germs

Is a steam sauna good for a cold? It may feel the most soothing for congestion, but neither steam nor dry heat has been shown to shorten a cold. Choose whichever you tolerate best and keep the session short. Our sauna vs steam room guide explains the differences in more depth.

How to use a sauna safely when you have a mild cold

Check your symptoms against the table above. No fever, no chest symptoms.
Drink a full glass of water before you start, and skip alcohol.
Lower the temperature: roughly 140-160°F (60-71°C) for a traditional sauna or 110-120°F (43-49°C) for infrared.
Keep it short: 5-10 minutes, one round.
Sit on a lower bench where the air is cooler.
Leave right away if you feel dizzy, weak, nauseated or your head pounds.
Cool down slowly, then rest and drink 2-4 more glasses of water.
Use your own home sauna, not a shared one, while you have symptoms.

If you are new to saunas, read how to use a sauna before trying it while unwell, and see how long to sit in a sauna for normal session times once you recover.

Sauna etiquette in gyms, spas and hotels

Cold viruses spread through droplets and shared surfaces, and public saunas are small, warm rooms with shared benches. If you have cold symptoms, the courteous choice is to stay out of shared saunas and steam rooms until you feel better. Operators of commercial saunas can support this with simple signage asking guests with fever or cough to skip sessions.

A private cabin solves the problem for many people. Mars Sauna offers indoor infrared and traditional models in 1- to 6-person sizes, including 120V plug-in saunas for home use.

This article is general information, not medical advice. People who are pregnant, have heart disease, low or high blood pressure or other conditions should talk to a doctor before using a sauna. See a doctor if you have trouble breathing, a fever lasting more than 4 days, or symptoms lasting more than 10 days, per the CDC.

Key takeaways

A sauna does not cure a cold or reliably shorten it; a Cochrane review found no clear benefit from heated, humidified air.
Regular sauna use is linked with fewer colds and respiratory illnesses in small or observational studies, which do not prove cause.
A short, gentle session is usually fine with a mild head cold and no fever.
Skip the sauna with a fever, flu, chest congestion, body aches or stomach illness.
Hydrate before and after, keep sessions to 5-10 minutes and stay out of shared saunas while contagious.