Lol yeah. Its just steam bro.
The same thing would happen if you were to collect rain water, heat it up, and shower in a cold bathroom.
Its not chemicals. In fact, as a kid, I always had a terrible cough thing that would almost kill me...they always told me to run a really hot shower and breathe in the steam, because it was good for my cough.
Interestingly enough, I also remember it working with the cold. Both extremes worked.






