What Causes Dry Brown Patches On Back?

Hi, I m JC! I am a 20 year old female. Here s my concerns: I first started noticing this clutter of red spots all over my chest when I was roughly 14. It only got worst over the year (and ruined my social life) so I researched and found that it might be Tinea Versicolor and attempted to cure it with Selsun Blue shampoo. I left it on over night, covering my entire chest, and woke up in the worst pain as I discovered my chest was bright red and covered in bloody scabs! So I did what any embarrassed child would do and hid it until it healed. When it finally did, I noticed my problem was gone. However, a year later it returned! Not as bad but very noticeable as it has now reached my neck. There are huge brown, dry patches on my back, and pill sized pink/ white spots around my neck. During summers I am welcomed with prickly feelings all over my torso and neck, and winters are filled with dry patches and every issue summers bring. Hot showers, soaps, any type of cream/lotion (dermatologist tested/fragrance free/intensive/sensitive).. doesn t matter, they inflame the spots! I m out of answers! And out of home remedies! I have hid from the sun, people, and am afraid of becoming a hermit! I have huge career goals, but this is diminishing my confidence! Please help! -JC