This is a follow up question. i was told i have tinea versicolor. i used selsun 2.5% and it cleared up in a week. i just want to know how did i get the tinea?

It's everywhere: Tinea versicolor if a fungal skin infection, usually on the back, chest, abdomen, and neck. It is found on people everywhere, all over the world. A person can put Selsun Blue on the rash areas, wait 10-15 minutes, and then take his regular shower. If he does this daily for 3 days, then once weekly for 3 weeks, and then once a month, it should work. See https://www.ncbi.nlm.nih.gov/books/NBK482500/