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White Spots on the Skin, What Could They Be?


 Dark spots usually get the most attention in dermatology, especially because of the concern for melanoma. Well what about white spots? Should they be of concern?


Today's blog post will review some of the more common white spots I get asked about as a board-certified dermatologist and what I suggest.


A special thank you to Detroit's own Fox 2 anchor Lee Thomas (pictured above) for helping to educate the community about vitiligo.


Happy #DermTipTuesday!



Post-inflammatory Hypopigmentation


What can cause this? Any condition that irritates or inflames the skin, such as eczema, seborrheic dermatitis, psoriasis, or traumatic injuries to the skin like cuts or burns. When the skin is injured, irritated, or inflamed, it will heal in one of two ways, become dark or light. The light discoloration is what is referred to as post- ("after") inflammatory hypo- ("under") pigmentation. The discoloration can take several months to resolve. Very rarely is it permanent.


Protect these areas from sun exposure at all times by wearing sunscreen with SPF 30 or above and protective clothing. Continue the sun protection even after it resolves.


Idiopathic Guttate Hypomelanosis


Little white dots that are sprinkled along the skin in sun exposed areas. We in dermatology really don't understand the exact mechanism of how they are formed. Hence the name, idiopathic ("unknown") guttate ("resembling a drop") hypo- ("under") melanosis ("disorder of pigment").


They are usually associated with sun exposure and sun damage. And to prevent getting more, sunscreen and protective clothing is the way to go.


These white spots will not resolve on their own. And they are very difficult to treat without discoloring the surrounding skin, but they cause no harm to the body to keep them.


Tinea Versicolor



A rash that is a collection of light spots scattered on the neck, chest, back, and or arms in a "Christmas tree" pattern. The yeast responsible for the rash temporarily causes pigment to drop out of the skin that can persist even after the rash is treated and the yeast are no longer in its active state to cause irritation and infla