Sauna for colds
TAKING A sauna with a cold – a conscious decision for your wellbeing
Should you use a sauna with a cold? It's a question that many people ask. Here we explain how sauna use and colds can be compatible and how regular sauna bathing can make you less susceptible to colds.
How colds and saunas are compatible – we explain
When it's cold and wet outside, the comforting warmth of a sauna is inviting. No other place is more synonymous with rest, regeneration, and the conscious care of your own health. The intense heat not only stimulates the circulation but also activates the immune system, mobilising the body's defences, benefiting your overall wellbeing.
But what if you're already feeling under the weather? Does a sauna help with a cold, if your nose is running, your throat is starting to feel scratchy, or you're feeling faint and chilly? How advisable is going to the sauna with a cold? Or can going to the sauna with a cold put additional strain on your body?
Between the desire to relax and the need to stay healthy, it’s easy to feel unsure what’s best. This article is here to help, with medically sound advice, clear recommendations, and the aim of helping you make an informed choice.
Immune Booster Sauna – With Balance During Colds
Regular sauna use is far more than a wellness ritual, it’s a proven workout for the immune system. Just like building endurance or muscle strength, targeted heat exposure can help strengthen the body’s natural defences.
High temperatures (typically between 70 and 100°C) create a kind of “artificial fever,” which activates immune cells, improves blood flow to the mucous membranes, and helps the body defend itself more effectively against viruses. This is why regular sauna bathing is considered a preventative measure against colds. The hot air may also help deactivate viruses in the upper respiratory tract before they take hold.
Good to know:
“After six months of regular sauna use, susceptibility to colds can decrease by up to 50%,” explains Prof. Dr. Karl-Ludwig Resch, director of the German Institute for Health Research. This insight is based on a study from the University of Munich.
But what if you already have a cold? If symptoms like a sore throat, runny nose, or chills are present, your immune system is already under strain. In this case, the additional heat stimulus from a sauna can become a burden, potentially leading to dizziness or worsening symptoms. It’s best to rest and wait until recovery before returning to the sauna, when its warmth can once again support your wellbeing.
After six months of regular sauna use, susceptibility to colds can decrease by up to 50%
Listening to Your Body – Sauna Use During a Cold
Not every minor ailment is a sign of infection. Regular sauna users often develop a strong sense of what feels right for their body. Especially during transitional phases, when the first signs of a cold or mild fatigue appear, the warmth of the sauna can sometimes feel soothing.
But caution is key: even a well-tuned body deserves care. Once the immune system is actively fighting an infection, especially if fever is present, the pleasant heat of the sauna can quickly become a strain. What strengthens the body on healthy days may tip the balance when illness is setting in.
A sauna session is only advisable if:
- You have no classic symptoms of infection such as fever, cough, or severe fatigue
- High temperatures (above 90°C) are avoided
- Abrupt temperature changes (e.g. ice-cold showers or plunge pools) are skipped
- The session is kept short
- You remain aware of how you feel and stop immediately if you feel unwell
Tip: For a mild cold, a short steam bath can be soothing. The gentle, moist warmth hydrates the mucous membranes, boosts circulation, and helps the body relax without placing it under strain.
Whether in an indoor sauna or a garden sauna, proper aftercare is essential: wrap up warm, rest, and give your body time to recover. In sensitive moments, it’s not intensity that matters but finding the right balance.
Soothing impulses – heat and salt inhalation for chronic conditions
For individuals with stable, chronic respiratory conditions, targeted heat can offer genuine relief. Regular sauna or steam bath sessions are often found to be soothing as the bronchi relax, mucus clears more easily, and breathing becomes less strained.
What feels intuitively beneficial is also supported by science. Heat promotes blood flow in the mucous membranes and helps regulate the autonomic nervous system, both of which can have a calming effect on sensitive airways. However, this is only advisable when no acute symptoms of infection are present.
Dry salt inhalation (halotherapy) may also support respiratory health. Microscopic salt particles can help thin mucus and reduce inflammation, making it easier to breathe, similar to the effects of sea air. While more research is needed, many people with asthma, bronchitis, or COPD report positive experiences with salt therapy.
Benefits of salt therapy at a glance
- Helps loosen trapped mucus
- Promotes blood circulation in the lungs
- Soothes irritated bronchi
- Helps to gently clear the airways of viruses and bacteria
In a pilot study conducted by the University Children’s Hospital in Tübingen, patients with cystic fibrosis experienced a significant improvement in key lung function parameters after just seven days of daily dry saline inhalations. These findings offer promising support for individuals with chronic but stable respiratory conditions.
Conclusion:
Using a sauna while ill is not recommended. However, for those with chronic respiratory conditions, without acute infection, heat, especially when combined with salt inhalation, can offer targeted relief for the respiratory tract.
Is the infrared cabin an alternative to the traditional sauna for colds?
Many people find the consistent, deep-penetrating heat of an infrared cabin particularly soothing, for example for muscle tension, chronic pain, or general exhaustion. But what about when a cold is coming on? Can infrared heat help, or do similar precautions apply as with a traditional sauna?
First, let's distinguish between the two: The classic Finnish sauna operates with hot ambient air between 70 and 100 °C and very low humidity. Infrared cabins, on the other hand, use radiant heat that targets the skin and penetrates deeper tissue layers, without significantly heating the ambient air.
This form of heat can:
• stimulate blood circulation and support the local immune system
• gently relieve muscular tension and accompanying back pain
• calm the autonomic nervous system for deeper relaxation and better sleep
• promote natural detoxification and metabolic processes
When used mindfully, an infrared cabin offers a gentle way to support the body, especially during times when the immune system needs care, not challenge. The key is always a considered approach to your own wellbeing. Whether and how it makes sense to use it depends entirely on how stable and well you feel.
Infrared for mild colds
If you are longing for soothing warmth but are not feeling well, a short session in an infrared cabin can be pleasant, provided you do not have any acute symptoms such as fever, a severe cough or chills.
Mindfulness is particularly important:
• a stay of 20 to 30 minutes is recommended
• avoid cold stimuli afterwards such as cold showers
• give yourself some rest afterwards and ensure you drink enough fluids
• Stop the session as soon as you feel unwell
Remember, even gentle heat can be physically demanding. If you're unsure whether the moment is right, it's often wiser to simply give your body a little more time.
Feeling Better? When Is It Safe to Return to the Sauna After a Cold?
Your cold has passed, the obvious symptoms have cleared, and you're gradually getting back to your normal routine. With that, the desire to return to your regular sauna sessions may be growing. But timing is key. Even after the cough and congestion are gone, your immune system may still be in recovery.
As a general guideline, you should wait at least three to five days after all symptoms have completely disappeared before using the sauna again. This assumes you're genuinely feeling well, more energetic, stable, and fully recovered.
The rule is simple: Get fully better first before you start sweating again. Even mild infections can leave lingering effects. Mucous membranes take time to regenerate, the autonomic nervous system remains sensitive, and your cardiovascular system needs protection. Returning to the sauna too soon can upset this delicate balance and increase the risk of a relapse.
The self-check: When is it safe to return to the sauna after a cold or sore throat?
Before heading back to the sauna, it’s important to take a moment to assess how you're really feeling. If you can confidently answer “yes” to all of the following questions, there’s generally no medical reason to avoid a gentle return to sauna use:
- Have I been free from fever for several days?
- Is my circulation stable?
- Do I wake up feeling refreshed, rather than fatigued?
- Have symptoms like coughing, hoarseness, body aches, or a runny nose completely disappeared?
- Has my appetite returned, and am I sleeping well?
- Do I feel physically resilient, for example able to enjoy a walk without feeling drained?
If you feel confident in these areas, you can plan your first sauna session with care. Opt for a lower temperature, keep your duration shorter than usual, and allow plenty of time to rest afterwards.
Ultimately, it’s less about the exact timing and more about how you feel; your stability, resilience, and that intuitive sense of being ready.
Slowly, gently, consciously: Returning to the sauna after a cold
Even if you're eager to get back into your sauna routine, it's important not to push your body too hard too soon. A gentle reintroduction allows your system to readjust and helps avoid setbacks.
Our recommendations for a careful return:
- Start gently: Begin with a low-temperature sauna session, or opt for the SANARIUM® at around 60°C.
- Less is more: One session is often enough. Limit yourself to a maximum of two rounds of 8–10 minutes. The classic “3 x 15 minutes” routine is still too intense at this stage.
- Avoid extreme cooling: Skip cold plunges or ice baths. Instead, take a lukewarm shower or a warm foot bath to cool down gradually.
- Stay hydrated: Drink plenty of fluids before your sauna session and replenish afterwards with water or herbal tea.
- Plan to rest: Allow yourself 20–30 minutes of quiet recovery after your sauna, ideally lying down, wrapped in a blanket, in a softly lit space.
Important: Listen to your body. If you experience headaches, dizziness, heart palpitations, or fatigue, it may be a sign that you've returned too soon. In that case, stop and give yourself more time to recover fully.
Thermal Training for Immune Health: How regular sauna use supports long-term health
Using your sauna regularly isn’t just a boost for your wellbeing, it can also strengthen your immune system over time. When used correctly, sauna bathing has been shown in numerous scientific studies to reduce susceptibility to colds and flu-like infections.
Each sauna session acts as a targeted stimulus: dry heat between 70°C and 100°C, followed by deliberate cooling. This thermal contrast trains your body’s thermoregulation and positively influences key systems, including the immune system, circulatory system, and autonomic nervous system.
Here’s how your body benefits:
1. Stimulation of immune cells
Regular sauna use increases both the number and activity of white blood cells, including T cells and neutrophils, which are essential for fighting off viruses and bacteria. This effect becomes more pronounced with consistent use over several weeks.
2. Improved blood circulation in the mucous membranes
Heat exposure improves circulation in the mucous membranes of the upper airways, strengthening local immune defences. Well-perfused mucous membranes are better equipped to block and eliminate pathogens.
3. Circulatory and nervous system conditioning
The alternation of heat and cold trains the body to deal with stress stimuli, a kind of "stimulus regulation." The autonomic nervous system becomes more balanced, which can have a positive effect on the immune system.
4. Support for Recovery and Sleep
Sauna sessions promote muscle relaxation, reduce stress, and have been proven to improve sleep quality. Since chronic stress and sleep deprivation can lead to a suppressed immune system, this indirect effect should not be underestimated.
5. Increased Resistance to Free Radicals
Sauna bathing temporarily raises the level of free radicals in the body. In response, your system activates protective mechanisms, a training effect that can be more effective than many nutritional supplements in the long run.
Prof. Dr. Resch, German Institute of Health Research:
“Rather than constantly suppressing free radicals with vitamins, it’s often more effective to challenge the body in a controlled way. Sauna bathing increases their presence temporarily — and this helps the body build long-term resilience. The immune system learns to neutralise these attackers reliably and sustainably.”
What truly matters is how you use the sauna. The benefits depend on regular use, your overall lifestyle, and last but not least, your individual physical condition.
Colds and saunas? Prevention is better than cure
Regular sauna use has been proven to strengthen the immune system, as shown by studies from Finland, Germany, and more recent studies with students. After just three months of consistent use, two to three times a week, susceptibility to colds can be significantly reduced, in some cases by up to 50%.
What's special about it is that the body's immune system reacts comparatively quickly. No daily rituals are needed, just targeted stimuli that activate the body without overloading it.
In practice, this means:
• 2-3 sauna visits per week, ideally for at least 8 weeks
• 2-3 sessions per session, each lasting 8-15 minutes
• Cooling down and recovery: cold shower or immersion bath, followed by a 20-30 minute rest period
•Don't forget to hydrate: choose alcohol-free and caffeine-free drinks before and after your sauna session.
Even between sauna use, small everyday stimuli can help reinforce the training effect and support your immune system. Simple practices like contrast showers, walks in fresh air, or basic Kneipp treatments act as gentle impulses that activate and strengthen your body’s defences. Effective, easy to integrate into daily life, and offer long-term benefits.
Sauna for colds: Mindful use for recovery and immune support
Sauna bathing is more than a wellness ritual. It's a boost for your own wellbeing and can be a true ally for your immune system, for prevention but also for gentle recovery. It's important to choose the right time and pay attention to your body's signals. Going to the sauna when you have a cold requires caution but also trust in the power of its regular, soothing warmth.
If you'd like to delve deeper into the topic, feel free to read our article on biohacking where we show how traditional rituals and modern health strategies can be effectively combined.
And for all practical questions about sauna bathing properly, you'll find concise tips in our sauna rules.
FAQ Sauna for colds
Only to a limited extent. As soon as symptoms such as a fever, a severe cough or pronounced fatigue appear, using the sauna is off limits – it would put a strain on the circulatory system and disrupt the healing process. In the case of very mild symptoms – such as the onset of a cold – a gentle sauna session can be beneficial under certain conditions. The key is: do not overexert yourself, avoid extreme temperature changes – and pay close attention to how you are feeling.
Yes – and this has even been scientifically proven. Regular sauna sessions boost the body’s natural defences: the heat activates immune cells, improves blood flow to the mucous membranes and increases resistance to stress. Just two to three sessions a week can significantly reduce susceptibility to colds – by up to 50 %, according to studies. The key is regularity – and a lifestyle that takes rest just as seriously as physical activity.
At the earliest, three to five days after all symptoms have completely subsided – and only if you feel fit, stable and able to cope with physical exertion again. Your first sauna session should then be deliberately gentle: a lower temperature, a short duration and sufficient rest afterwards. It is not the calendar date that matters, but how your body feels.
