There are so many amazing healing benefits to sauna therapy.
I suggest focusing on hydration prior to sauna and for the rest of the day following sauna use.
This can be a powerful practice for detoxification so you will want to remember to flush out all those cellular toxins you are releasing.
Sometimes sauna can be a building tolerance game depending on your constitution and your toxicity levels. Remember you can always start very slow and build from there.
The above photo is taken at our local Kananaskis Nordic Spa, which is defiantly worth checking out.