I am still not on Dr. Brizman´s treatment protocol, so I am the last one who should give any advice to you. I don´t know if sauna is contraindicated with the treatment. This is just my own experience with infrared (IR) sauna, which is more gentle than normal sauna. I spent 2 yrs on the long-lasting ABX treatment (because of my IC) and I used IR sauna regularly for the detoxification process, especially in winter time. I know that a lot of people using ABX for Lyme disease, Mycoplasma infection etc. use it. for the same reason. The temperature inside is between 45 - 60 Celsius degrees (113 - 140 F degrees, hope my converter transformed it correctly) and this is what bacterias hate ang fungus too. The general overheting of the body for a short time (30 minutes) should supposedly bother bacterias. And I can say, perhaps this is not false, because it helped me a lot - my skin was much much better, my muscles were more relaxed (pelvic muscles too) and although I felt very tired immediately after that, drunk a lot of water and went to sleep, the following days I felt very good. And my bladder tolerated it very well (I was really afraid of bladder reactions, but they never come). Later I have tried normal sauna and my bladder was also OK with it, but it was too strong for me and I did not feel good after it (fatigue, the feeling of total exhaustion). So - no more experiments there.
As I say above, it´s just my experience, I don´t have the courage to recommend it to anyone. It would be better to ask Dr. Brizman, what she thinks about. I will ask her during my appt with her.
 

I believe we're not supposed to do anything that alters our body temperature significantly. Dr B told me I should stay away from very hot yoga both bc my body is too sensitive to temp changes, And bc hot yoga detoxifies your body too quickly, which I believe is also the case with saunas.