My old urologist was 45 years my senior. He passed on over 20 years ago. He firmly believed in them and was a respected pioneer in a large medical community visited by people from all over the world. Here is my earlier post on that experience:
He also prescribed very hot sitz bath in about 4 inches at 117F. Not over 120F for sure, OK!
He said, and it's true that, you can sit in hotter water than your feet or hands will tolerate. My dad treated athletes foot with very hot foot soak too. Feet in for 30 seconds and out for 30 seconds, till it cooled off a little. Hot tea bag on closed eye is good too, for stopped up tear ducts. I used very hot rag laid on my face when I was in high school, for pimples.