About 6 months ago I had a few dark spots show up on my leg. Within 4-6 weeks, there were more dots in between, and they formed a line down the back of my leg (see current pic at https://www.dropbox.com/s/qr1kau9bscxq4tn/2017-07-25%2001.40.29.jpg?dl=0). I scheduled a dermatologist appointment. I was prescribed a very strong steroid cream, Clobetasol. It made the dots fade about 50%. They slowly started coming back, though. I've tried miconazole cream, Dr. Christopher's Black Ointment, tea tree oil, coconut oil, and colloidal silver gel. I think they've slowed the spread of this rash, but it's still grown over the last few months. Any idea what this is and what I should do?
I'll note that the only cause I can think of is some baths I take. I take a couple very hot baths a week to detox. I noticed that when I cross my legs in the bath, the surface of the water hits my leg in the exact line where the rash is. I'll admit that I didn't clean the bathtub as much as I probably should have. Maybe this is the cause.