Effects of Whirlpools on Blood Pressure

Q:  I am a 70-year-old man who takes Prinivil 20 mg a day for high blood pressure. I would like to install a whirlpool bath in my home, but people have been telling me that's a no-no for people with high blood pressure. I will be seeing my own doctor in two months, but would like a second opinion.

A:  The major concern with very hot baths is that your blood pressure will get too low because the heat causes your blood vessels to dilate, resulting in blood being more concentrated in your skin instead of your internal organs. That's why people often feel lightheaded if they stay in too long or get up suddenly.

If you have high blood pressure that is not well controlled, the heat could cause rapid swings in your pressure, but if your pressure usually stays in normal range with your medication, then I think it wouldn't be harmful. Just don't stay in for more than 15 minutes or set the temperature above 104 degrees F.

"Dear Doctor" is a compilation of patient questions answered by doctors from the Medical College of Wisconsin.