Hi Laura,
I have used an infrared sauna for five years on a daily on and off basis as it is one on the list of Dr. Wilsons (nutritional balancing) protocols. I just feels good for one. It also has healed a soar in my mouth when I put the lights close to my mouth. It is also shrinking a benign breast tumor when I put the light close to it. It can be used for specific healing areas and just overall the body. A friend of mine got a laser infrared light specifically designed for healing tooth decay.
It needs to be near infrared to avoid the EMF emitting lights on the far infrared. You can just get those red lights they use to warm chicks which are the same thing, or you can get something fancy on the internet. You can convert a closet or a shower into a sauna space or get a fancy one on the internet. You can heat the sauna up with an electric heater to get it hot so you sweat, but be sure to turn it off when you enter it to avoid the EMFs.
https://www.drlwilson.com/SAUNAS/BUY%20OTHER%20SAUNAS.htm
Here is a link to a page that has a lot of information about it. I would consider sauna just another detox and healing protocol to add to the arsenal.