🔍 What Are These White Spots?
The most common cause is Idiopathic Guttate Hypomelanosis (IGH):
"Idiopathic" = unknown cause
"Guttate" = small, drop-like
"Hypomelanosis" = reduced pigment (melanin)
These spots are:
Small (2–5 mm, about the size of a pinhead or pencil tip)
Perfectly round or oval
Smooth to the touch (not scaly, raised, or itchy)
Most common on sun-exposed areas: forearms, shins, shoulders, face
More noticeable in people with darker skin tones
☀️ What Causes Them?
While the exact cause isn’t fully understood, experts believe IGH is linked to:
Chronic sun exposure (UV radiation may damage pigment-producing cells)
Aging (very common after age 40—up to 80% of adults have them)
Genetics (runs in families)
✅ Important: They are NOT caused by fungus (like tinea versicolor), vitamin deficiency, or poor hygiene.