Selenium sulfide
"PT 2:  The next day, I woke up with burns in the creases below my breasts and where my skin had been touching ("stomach roll" to put it plainly.)  I do sweat in my sleep and thought perhaps the friction of the skin contact with the lotion and sweat caused the reaction but after spending the next few days with my breasts TAPED up, the red marks began to heal and left some pretty bad skin burns that had to heal and were raw if I didn't keep them dry with tape and cotton pads.  The tinea versicolor did go away but I got a fun new skin irritation.  Just wanted to warn others about my mix-up in case they read the comments wrong or have sensitive skin like me to be careful!"