Dizziness & Vertigo Support Group
Dizziness is the sensation of instability. Vertigo refers to dizziness with a sensation of motion. Vertigo is more likely than other types of dizziness to be associated with nausea, vomiting, or double vision, to occur even when lying down, and to feel better with the eyes closed. If you are a frequent sufferer of dizziness or vertigo, join the group and find support.
I think some of it is not getting enough oxygen in the enclosed space of the bathroom and/or shower stall.
The other thing is the blood pressure is dropping low due to the heat.
And the fourth thing, is the humidity is so high it makes it difficult to breath. With all those happening, it's really hard to not feel faint, especially if you like the water really hot.
Keep a window open or a door cracked open for your safety. Peace