If you have cardiovascular disease, cardiac arrhythmia, excessively high or low blood pressure, fever, cancer, skin disorders, blood clots, varicose veins, or respiratory infections, the sauna may be more harmful than helpful for you. ​ If you have untreated myocardial hypertrophy, coronary artery disease and/or chest pain, untreated high blood pressure, other cardiovascular health problems or cardiac arrhythmia, it may be best to avoid cold water. ​ Please consult your doctor if you’re not sure whether you should use the sauna or cold plunges. If you are pregnant, please consult your doctor before using the sauna and cold plunges.