i have these light spots on my back, stomache,arms and hands what are they?

I also have these white spots that are coming out on my skin they started out really small and now enlarging on the skin under my breast on the middle of my back and now a small spot right under my chin. I noticed i started getting them when i went away on vacation. My friend and my sister have it as well in the same areas i've done research and know for sure that it is not vitaligo. I believe it is Tinea Versicolor my friend and my sister both seen a dermatologist and thats exactly what it is. I say look into this it can be treated with topical cream like clotrimazole. Tinea is actually a fungus that grows on the skin from being in places like tanning salons, locker rooms... etc. There are alot of ways to get it.