Sauna before or after massage is a question with a fairly settled practical answer and very little research behind it. The convention, in spas and among most practitioners, is heat first. The reasoning is straightforward and the exceptions are worth knowing, because the order genuinely changes how the session feels.
The case for before
Heat raises tissue temperature and blood flow and leaves most people more relaxed, so soft tissue work meets less resistance and is more comfortable. It also means you arrive clean and already unwound. This is why spa sequencing almost always runs heat, then table, and why it is the default a practitioner will suggest if you ask.
When after makes sense
If the massage is deep and you expect soreness, gentle heat afterwards can feel good, much as it does after exercise. Some people also find heat after a treatment prolongs the relaxation rather than washing it off. The argument against is that you are leaving in a dehydrated, very relaxed state, which is not ideal before driving.
Timing and the gap
Leave a gap either way rather than going straight from one to the other. Fifteen to thirty minutes lets your temperature and heart rate settle, and a cool rinse in between is pleasant. Going directly from a hot cabin onto a table while still sweating is uncomfortable for both of you and the oil does not behave.
Hydration, and who should ask
Both heat and massage move fluid around, so drink before and after and expect to want more than you think. If you have a cardiovascular condition, low blood pressure or are pregnant, the order is a question for your clinician and your practitioner rather than for a buying guide, and the honest answer is that the evidence here is thin either way.
Questions people ask about sauna before or after massage
Which order do spas use?
Almost always heat first. Warm tissue takes soft tissue work more comfortably and you arrive relaxed.
Is there research on this?
Very little. The convention rests on practitioner experience and comfort rather than on trials, and we are not going to claim more than that.
How long should the gap be?
Fifteen to thirty minutes with a cool rinse. Going straight from the cabin to the table is uncomfortable and the oil will not sit.