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Have you noticed small white spots on your arms or legs… and you don’t know what they are?

Yes—those small white spots you’re noticing are likely guttate hypomelanosis, a very common and harmless skin condition. While it can be surprising (or even concerning) at first, it’s almost always benign, non-contagious, and not a sign of serious illness.

Here’s what you need to know:


🔍 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:

 

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