Hello,
From the symptoms it can be pityriasis alba or pityriasis versicolor. Pityriasis alba is a common skin condition mostly occurring in children and usually seen as dry, fine-scaled, pale patches.
No treatment is required and the patches in time will settle in due course of time. The redness, scale and itch if present may be managed with simple emollients and sometimes hydrocortisone, a weak steroid, is also used.Severe cases may require PUVA therapy.
Pityriasis versicolor is caused by a fungus that lives in the skin of almost all adults. Factors that can cause the fungus to become more visible include high humidity and immune or hormone abnormalities.Treatment involves topical and oral antifungal medicines. I suggest you to get an evaluation done from a dermatologist and get it evaluated.