How can nummular dermatitis lead to lichen simplex chronicus?

Updated: Nov 21, 2019
  • Author: Jami L Miller, MD; Chief Editor: William D James, MD  more...
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Longstanding lesions that have been aggressively scratched may develop lichen simplex chronicus. This often occurs on the lower legs, neck, scalp, or scrotum. The typical erythema of nummular eczema becomes violaceous and thickened. Although the border of lichenified lesions remains well demarcated, in some areas it may become less so, particularly on the genitalia.

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