Surface level symptoms that don't go away with topical treatments almost always have a deeper root cause. In my case I had white spots all over my back and chest that began to itch and scale. I tried absolutely everything including raw garlic poultices, pure oregano essential oil, powerful manmade antifungals, etc.
The only thing that worked for me was to eat a 100% green leafy vegetables diet and kill off a bunch of candida colonies from my intestines. It went away in about 1 month.