is idiopathic guttate hypomelanosis (IGH). This condition causes tiny, flat white spots that usually appear on areas exposed to the sun, especially the forearms, shins, and legs. IGH becomes more common with age and is thought to result from long-term sun exposure. These spots are harmless, not contagious, and generally do not require treatment unless they are a cosmetic concern.
Another possibility is vitiligo, a condition in which the immune system attacks pigment-producing cells in the skin. Unlike IGH, vitiligo often produces larger, sharply defined white patches that may gradually
