Ice Baths and Sauna With High Blood Pressure or Epilepsy

You are considering an ice bath or a sauna, and you have high blood pressure or epilepsy. If your doctor approves an experiment, you can note symptoms on paper or in the symptom diary in Sam. Sleep, resting heart rate and heart rate variability from Apple Health sit in the same app, a few taps from the entry.

With high blood pressure or epilepsy, ask your doctor before an ice bath or a sauna. The American Heart Association cautions anyone with a heart history against cold water immersion, and the Wim Hof Method's own safety page says not to practice it with epilepsy. Sources also advise people with heart disease against jumping into cold water after a sauna. This text is general information, not permission to try anything.

This post does not tell you whether cold or sauna is right for you. For some people it can be genuinely dangerous, so anyone considering these practices with a chronic condition should ask their doctor first. Your health care team decides.

What do the heart experts say about sudden cold?

The American Heart Association describes what happens when you plunge into cold water. It triggers the cold shock response: a sudden, rapid rise in breathing, heart rate and blood pressure. A person can drown within seconds if they gasp while the head is under. The shock also places extra stress on the heart.

The same organisation cautions against cold water immersion for anyone with a cardiac history. It notes that little of the research includes people with heart conditions. Harvard Health adds that cold plunges are not advisable for anyone who has had cardiovascular disease, especially people with heart rhythm problems such as atrial fibrillation, and people with circulation problems like peripheral artery disease or Raynaud's.

What does the research on cold water and the heart show?

Harvard Health says the adrenaline surge from cold shock can disturb heart rhythm, which is usually not a problem for a healthy heart. Studies in healthy people do not tell you what applies to a heart or blood-pressure condition.

Water removes heat from the body far faster than air, so hypothermia is a real risk and can continue after you get out. Experts advise getting straight into warm clothes and rewarming quickly. Several sources are blunt about the biggest rule: never do a cold water swim or plunge on your own.

Is a sauna safe with high blood pressure?

A sauna does something like light exercise: heart rate rises and blood pressure can drop. Many people in good health tolerate a dry sauna well.

But the sources are careful about who should not use one. Conditions where a sauna is not recommended include unstable chest pain, uncontrolled high blood pressure, a recent heart attack, decompensated heart failure and severe narrowing of the aortic valve. Low blood pressure, dehydration, fever or an acute infection also count as cautions. Research on saunas often excludes people with uncontrolled high blood pressure.

The risky step is often the contrast. If you have heart disease, do not jump into ice water or a cold pool right after the sauna; the sudden temperature swing can disturb heart rhythm and blood pressure. Alcohol around a sauna also raises risk. Whether a sauna fits you is a question for your cardiologist.

What does the Wim Hof method's own safety page say?

The safety page of the method itself is direct. Do not practice the method while pregnant or with a potentially debilitating condition such as epilepsy. For cardiovascular issues or any other condition, always consult a doctor before starting.

It also says never to do the exercises before or during diving, driving, swimming or a bath, or in any environment where passing out could cause injury. Cold exposure, it says, can have serious health consequences including hypothermia. High blood pressure and asthma are not named there; they fall under the general advice to ask a doctor first.

Why does fast breathing matter for epilepsy and panic?

The method's breathing uses many fast, deep breaths, which is deliberate hyperventilation. During an EEG, doctors use fast breathing as an activation test because it can bring out abnormalities. In a study of one children's epilepsy centre, 13 of 150 EEGs (9 percent) showed an abnormal response to the maneuver. In 6 of those it brought on spike-and-wave discharges, with or without absences. That was a supervised medical test, not a home breathing routine.

For panic, the mechanism is different. Fast, deep breathing can cause lightheadedness, tingling, a racing heart and dizziness, sensations that can feel frightening for someone with a panic disorder. If you have a panic disorder, ask your doctor before trying any forced breathing technique. If a practice makes you feel unwell or faint, that is a stop signal, not a reason to push through.

What about water and baths with epilepsy?

A person can drown if a seizure happens in water, even if they swim well. The Epilepsy Foundation says bathtubs are a common place where people with epilepsy drown.

Its water safety advice is practical: take showers instead of baths, keep drains clear, use a shower chair if you tend to fall, and swim only in supervised places with someone who can help pull you out. Avoid diving head first. A plunge pool combines cold shock, breath holding and submersion, so ask your neurologist before trying it.

What all this means for your epilepsy is for your neurologist to say. If a seizure happens in water, call your local emergency number (112 in the EU, 999 in the UK, 911 in the US) straight away, keep the person's face out of the water, and once they are out, turn them onto their side.

Which questions do I take to the doctor?

More on preparation is in our doctor visit checklist for a chronic condition.

• Given my condition and current status, may I try cold, like an ice bath, a plunge pool or a cold shower? If not, why, and if yes, under which conditions?
• Do my medicines affect how I respond to heat, cold or fluid loss?
• Is a sauna allowed, and what should I do to cool down after?
• Do fast breathing exercises conflict with my epilepsy, panic disorder or asthma?
• What about alcohol before or after?
• How do I recognise when to stop, and who should be with me?
• Do I need a check first, like a blood pressure series, an ECG or an EEG?

Bring your current medicine list.

How do you record what happens after cold or sauna?

Only after you and your doctor agree that an experiment is fine does a record help. A short entry afterwards gives you material for the next talk. An entry can hold:

• Date and time, and what it was: sauna, cold shower, ice bath or breathing exercise
• How long, as you experienced it, and who was with you
• Resting heart rate and blood pressure before, if you have a device
• Pulse after
• Symptoms during and up to 24 hours after: dizziness, palpitations, headache, shortness of breath, aura or seizure, each yes or no and when
• Alcohol and the sleep of the night before
• What your doctor said

The entry does not say whether the cold was good or bad for you. It shows your doctor what you experienced. Do not change or stop a medicine on your own.

If you get chest pain or serious shortness of breath during or after cold or heat, call your local emergency number (112 in the EU, 999 in the UK, 911 in the US). The same applies after a faint if the person is not fully clear after a minute, is injured, has chest pain, breathlessness or palpitations, or fainted during exertion or lying down. If they recover quickly and none of that applies, call the doctor the same day.

Note what happens after cold or sauna in Sam and bring it to the visit

You walk into the appointment with a record instead of a memory of last winter.

• A blood pressure value goes in the blood pressure program, a seizure in the epilepsy program (each a diary with a doctor report, started once you switch on that a doctor diagnosed you); the rest of the template sits in the entry note.
• A seizure entry you make the same day gets sleep, heart rate variability and resting heart rate from Apple Health when data exist, so you see them next to the entry instead of across screenshots.
• Symptom days without a program go into the symptom diary day by day.

Sam records. It does not measure blood pressure and it does not judge whether cold or heat is safe for you.

Try Sam Health

Sam is a wellness companion, not a medical device. The app does not diagnose, treat, cure or prevent any condition or health state. Always consult qualified professionals for medical decisions.

Related reading

• High altitude travel with a chronic condition
• Living with epilepsy: sleep routine and daily life
• Resting heart rate and high blood pressure: what your wearable shows
• Doctor visit checklist for a chronic condition

Sources

Updated: October 2026

• American Heart Association News: You're not a polar bear: The plunge into cold water comes with risks
• Harvard Health: Cold plunges: Healthy or harmful for your heart?
• Laukkanen JA et al.: Cardiovascular and Other Health Benefits of Sauna Bathing (Mayo Clinic Proceedings, 2018)
• Brown Health: Is it Safe to Use a Sauna If You Have Heart Disease?
• Wim Hof Method: Health risks and safety
• Epilepsy Foundation: Water Safety and Seizures and Staying Safe with Seizures
• CDC: First aid for seizures (15 May 2024)
• Rios-Pohl L et al.: Hyperventilation maneuver during EEG in children with epilepsy (Epilepsia Open, 2021)
• NHS: Fainting