Infrared sauna

The mechanism is straightforward heat physiology. Nothing mystical, and nothing about detoxification.

• Warmth on pain and muscle

  Heat increases local blood flow, reduces muscle tone and raises the pain threshold. This is the same reason a hot water bottle works, delivered more evenly and for longer.

• A mild cardiovascular load

  The body responds to heat by dilating skin vessels and raising heart rate — a light, passive cardiovascular stimulus. That is both the potential benefit and the reason for the long caution list.

• Autonomic shift and relaxation

  Sustained warmth, quiet and stillness reduce sympathetic arousal. Much of what people value in a session is this rather than anything specific to infrared.

• Sleep

  Passive warming followed by cooling mimics the temperature drop that helps sleep begin. Timing the session for the early evening matters more than the temperature does.

• What it does not do

  It does not remove toxins, heavy metals or disease through sweat. Sweat is overwhelmingly water and salt; detoxification is done by your liver and kidneys. Anyone selling this on a detox claim is selling something else.

The honest indication list is short, and it is about comfort rather than disease.

• Muscular aching and stiffness

  Especially in people who have been immobile, or whose posture has changed after surgery.

• Chronic musculoskeletal pain

  Non-inflammatory back, neck and joint pain. Modest and short-lived relief, but genuine.

• Cold intolerance

  Common with weight loss, anaemia and low thyroid. Feeling properly warm for the first time in weeks matters more than it sounds.

• Sleep and relaxation

  As part of an early-evening routine, when other approaches have not worked.

• Deconditioning, in the recovery phase

  Under supervision and once cleared, passive heat is sometimes used to provide light cardiovascular stimulus in people who cannot yet exercise. This use needs medical agreement, not self-direction.

Especially worth considering if

• Stiffness and aching are your main complaint and your heart is in good shape.
• You respond well to hot showers and hot water bottles already.
• You are past active treatment and cleared by your team.
• You want physical comfort rather than a treatment for something.

This is the longest caution list on the site, and that is deliberate. Heat lowers blood pressure, causes fluid loss, and stresses the circulation. Many of the people we care for cannot safely tolerate that. Everyone needs medical clearance before a first session — no exceptions.

Stop — clearance needed first

Do not start until your medical team has confirmed it is safe for you.

• Any significant heart condition

  Unstable angina, recent heart attack, severe aortic stenosis, uncontrolled arrhythmia, or poorly controlled heart failure. Heat increases cardiac work and drops blood pressure. Cardiology clearance is required.

• Low blood pressure, fainting, or postural dizziness

  Heat lowers blood pressure further. Fainting inside a hot cabin is a serious event.

• Fever, active infection, or neutropenia

  No sessions. Heat adds to physiological stress and shared cabins carry infection risk.

• Dehydration, vomiting, diarrhoea, or poor oral intake

  Sweating on top of existing fluid loss risks collapse and kidney injury. Very common during chemotherapy — postpone.

• Multiple sclerosis

  Raised body temperature temporarily worsens neurological symptoms in many people with MS. Usually avoided.

• Peripheral neuropathy or any loss of sensation

  If you cannot feel heat accurately, you cannot tell when skin is burning. This is a genuine burn risk and needs assessment first.

• Pregnancy

  Raised core temperature is avoided in pregnancy.

• Lymphoedema or a limb at risk

  Heat can worsen swelling. Generally avoided unless your lymphoedema specialist agrees.

• Active radiotherapy skin reaction, open wounds, or fresh surgical sites

  Not until healed and cleared. Irradiated skin is heat-sensitive for a long time afterwards.

• Severe frailty, cachexia, or inability to get out unaided

  Anyone who cannot leave the cabin independently should not be in one, regardless of supervision.

Proceed, with changes

These do not rule the therapy out. They change how it is delivered — tell us so we can adapt it.

• Diabetes

  Impaired sensation, altered sweating and unpredictable blood sugar. Shorter sessions, check glucose before and after, never alone.

• Diuretics and blood pressure medicines

  Amplify fluid loss and the drop in blood pressure. Extra fluids beforehand and a slow, seated exit.

• Older adults

  Reduced thirst sensation and less efficient temperature regulation. Lower temperature, shorter duration, someone present throughout.

• Medicated patches

  Heat increases absorption from patches — fentanyl in particular — which can cause overdose. Discuss with dr. Ricky before any session.

• Implanted devices and metal implants

  Generally acceptable with infrared, but check with your cardiologist for pacemakers and defibrillators first.

• Skin conditions and photosensitivity

  Some medications increase heat and light sensitivity. Check your list before the first session.

• Alcohol and sedatives

  Never combine with heat. Both blunt the warning signs and increase fainting risk.

Medicines, devices and interactions

Bring your full medication list, including anything bought without a prescription.

• Transdermal patches — the most important one

  Heat can substantially increase absorption of fentanyl, buprenorphine, nicotine and hormone patches. This has caused serious overdoses. Never heat the area over a patch.

• Diuretics, ACE inhibitors, beta blockers

  Increase the risk of dehydration and low blood pressure during and after heating.

• Insulin and oral diabetes medication

  Heat increases insulin absorption from injection sites and can cause hypoglycaemia. Check glucose before and after; keep treatment for a hypo within reach.

• Drugs affecting sweating

  Anticholinergics, some antidepressants and antihistamines reduce sweating and impair cooling, raising the risk of overheating.

• Anything causing drowsiness

  Opioids, benzodiazepines, antihistamines. Reduce awareness of overheating and increase the chance of fainting on standing.

Before

• Medical clearance. This is not a formality here — a first session does not happen without it.
• Drink water beforehand and eat something light. Never on an empty stomach or after alcohol.
• Blood pressure is checked before you go in, and someone stays nearby throughout.
• Remove jewellery and any medicated patch is identified and protected.

During

• Lower air temperature than a traditional sauna — usually around 45–60°C — but the warmth reaches you directly.
• First sessions are short: 10–15 minutes at the lower end of the range.
• You should feel pleasantly warm, not struggling. Dizziness, palpitations, nausea, headache or breathlessness mean come out now.
• Water within reach, and the door is never locked or obstructed.

After

• Come out slowly and sit for several minutes before standing. This is when fainting happens.
• Cool gradually. No cold plunges, and no cold showers if you have any cardiac history.
• Drink more than feels necessary. Fluid loss is greater than it seems.
• Muscles feel looser for a few hours. Tiredness afterwards is common and should be mild.

Be strict with this one. The evidence is weak, the cost and effort are real, and there are safer therapies for most of the same symptoms. It should earn its place.

Signs it is helping

• Stiffness and aching noticeably reduced for several hours afterwards.
• Easier movement in the evening after a session.
• Better sleep on session nights.
• Feeling warm and comfortable when you have been cold for weeks.
• No dizziness, no exhaustion, no next-day cost.

Pause and tell us if

• Any dizziness, palpitations, chest tightness or breathlessness — come out immediately and seek medical review before booking again.
• You feel drained the following day rather than looser.
• Skin becomes red, sore or blistered.
• Swelling increases in a limb at risk of lymphoedema.
• You need to be helped out of the cabin.
• Three or four sessions with no benefit that lasts beyond the hour.

Length of a session

Start at 10–15 minutes at the lower temperature range. Build to 20–25 minutes only if it is well tolerated.

Initial course

Once or twice weekly. More frequently is not better and increases dehydration risk.

Continuing

Weekly if it continues to help. Reassess after any change in cardiac status, medication or fluid balance.

When we review it

At four sessions, and before every session ask whether anything has changed — a new patch, a new blood pressure tablet, a bout of vomiting.

• Get medical clearance and treat it as compulsory

  More people are excluded from this therapy than from anything else we offer. The clearance is the safety system, not a formality.

• Never use it alone

  Someone should be within earshot the whole time and know you are in there. Fainting inside a hot cabin, alone, is the scenario the entire protocol exists to prevent.

• Hydrate before, during and after

  Drink before you go in, keep water with you, and drink after. Thirst is an unreliable guide, particularly for older people.

• Check your patches

  Fentanyl, buprenorphine, hormone and nicotine patches all absorb faster when heated. This has caused real overdoses. Tell us where every patch is.

• Start shorter and cooler than you think you need

  Ten minutes is a real session. There is nothing to be gained from enduring more, and the risks all scale with duration.

• Skip it on chemotherapy weeks

  Low blood counts, dehydration and nausea are the wrong combination for heat. Use the recovered part of your cycle if you use it at all.

• Stand up slowly and sit down first

  Blood pressure is at its lowest as you come out. Most incidents happen in the first two minutes after leaving.

• Disregard detox claims entirely

  Sweat does not remove toxins or disease. If a provider's main selling point is detoxification, that tells you how carefully they are thinking about your safety.

This is the weakest evidence base on the site and we will not dress it up. Most research on sauna bathing comes from Finnish traditional sauna in healthy populations, where regular use is associated with cardiovascular benefits — association, in people quite unlike our patients. Repeated infrared heat therapy has been studied for chronic heart failure and chronic pain, with small studies suggesting modest benefit; none of this establishes value in cancer, palliative or frail populations, where it has barely been studied at all. Claims about detoxification, immune enhancement and cancer treatment are unsupported. Our position: offered as physical comfort for aching and stiffness, in carefully selected people who have been medically cleared — and readily dropped if it does not deliver.

Sources informing this page

• US National Center for Complementary and Integrative Health (NCCIH)
• Published Finnish cohort research on sauna bathing and cardiovascular outcomes — observational, in healthy adults
• Studies of repeated thermal (Waon) therapy in chronic heart failure — small trials, specific protocols
• National poisons and drug-safety reporting on heat and transdermal patch absorption

Named for transparency about where our position comes from. Specific study references are added by our clinical team at review.

Take these to your doctor before you start. They are the questions that change what is safe for you specifically.

• “Is my heart and blood pressure safe for passive heat?”
• “Given my current fluid balance and kidney function, is sweating advisable?”
• “I wear a medicated patch — what precautions do I need?”
• “Does my neuropathy put me at risk of burns I would not feel?”
• “Should I avoid this entirely during chemotherapy weeks?”
• “Is there a safer way to get the same relief for my stiffness?”