Where does melasma most commonly develop? what areas of the body does melasma most often develop? .

Melasma: Melasma commonly develops on cheeks, forehead, nasal bridge, chin and upper lip. Forearms and neck may also be, infrequently, affected. Women are most commonly affected, frequently during pregnancy, hence the name "mask of pregnancy". Sun protection is key to control. Combination treatment works best to minimize pigmentation changes.

Face : Almost all of the time it is on the face. I've seen 1 patient who had it on their arms.