Which physical findings are characteristic of seborrheic dermatitis?

Updated: Nov 13, 2020
  • Author: Marc Zachary Handler, MD; Chief Editor: William D James, MD  more...
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Answer

The scalp appearance of seborrheic dermatitis varies from mild, patchy scaling to widespread, thick, adherent crusts. Plaques are rare. From the scalp, seborrheic dermatitis can spread onto the forehead, the posterior part of the neck, and the postauricular skin, as in psoriasis. Note the images below.

Seborrheic dermatitis affecting the scalp line and Seborrheic dermatitis affecting the scalp line and the eyebrows with red skin and scaling. Courtesy of Wilford Hall Medical Center Dermatology slide files.
Seborrheic dermatitis may affect any hair-bearing Seborrheic dermatitis may affect any hair-bearing area, and the chest is frequently involved. Courtesy of Wilford Hall Medical Center Dermatology Teaching slides.

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