1. The Most Likely Culprit: Idiopathic Guttate Hypomelanosis (IGH)
If you are above the age of 30 and have seen very small, porcelain-like white spots on your shins or forearms, chances are that what you have is called Idiopathic Guttate Hypomelanosis (IGH). Though the name sounds scary, it is one of the most common skin problems.
In medical terms, “idiopathic” denotes the unknown cause of the problem, “guttate” is the term for the tear-drop shape, and “hypomelanosis” means the absence of pigment. As indicated by studies published in numerous dermatological periodicals, IGH is basically a manifestation of “aging of the skin” plus prolonged UV irradiation. The rays of the sun over decades may impair melanocytes (cells producing pigmentation) in isolated and localized sites; the cells just “shut down.”
Appearance: Pale patches in a flat and smooth form measuring from 2mm to 5mm across.
Location: Usually the shins, forearms, and occasionally the face or upper back.
According to the American Academy of Dermatology (AAD), IGH is not a precursor to skin cancer and is purely a cosmetic concern.
What can be done
