I have tinea versicolor myself. It gets more noticeable as the temperatures get warmer and/or when my diet becomes not-so low-carb...
I was told by a dermatologist a long time ago that some people are just sensitive to that particular issue. He said I would likely re-catch it every summer, even if I killed it off (which I think I did for two seasons, then gave up).
With my pregnant wife having carby food around all the time and spring starting in Tucson (which is really like slightly mild summer here), it's really starting to act up.