Tinea versicolor often starts in the back and works its way to the front and arms, making a pattern that's sometimes considered to look like a "christmas tree". the patches are oval, offset at a diagonal, and have some scaling at the edge. There's stuff that can be done about it!
you need an antifungal treatment. it sounds like tinea versicolor. see a dermatologist
go see your doctor, there are a bunch of reasons to get non-tanning spots all over your body.
some possibilities could be pityriasis rosea, syphilis, tinea corporis (ringworm - body fungus), seborrheic dermatitis, acute psoriasis, and tinea versicolor.