Which physical findings are characteristic of excoriation (skin-picking) disorder?

Updated: Jul 10, 2018
  • Author: Roxanne Graham, MD; Chief Editor: Dirk M Elston, MD  more...
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Answer

Often, right-handed persons tend to pick at their left side, left-handed people at their right side. The erosions and scars tend to have angulated borders. The quantity of erosions and scars is variable. Several lesions to hundreds of lesions can be present. Erosions, crusts, and scars are located only where the patient can pick. Lesions can be either crusted or noncrusted (see the images below).

A picker's nodules with no crust and a scarred app A picker's nodules with no crust and a scarred appearance.
A picker's nodule with crusted lesions. A picker's nodule with crusted lesions.

Erosions can vary in morphology and can sometimes evolve into frank ulcers. Dug-out erosions or ulcers, crusted erosions, and ulcers can be present. Sometimes, erythema and scars are present around the erosions and the ulcers.

In dermatitis artefacta, the patient creates skin lesions to satisfy an internal psychological need, usually a need to be taken care of. The clinical presentation is characteristic, and it differs from that of excoriation disorder, delusional disorders, malingering, and Munchausen syndrome. Munchausen syndrome by proxy is a form of dermatitis artefacta.

Except when the lesions mimic another disease, those that do not conform to descriptions of known dermatoses are shrouded in mystery, appearing fully formed on accessible skin, within the context of a characteristic psychological constellation. The patient is friendly but bewildered, and relatives may be angry and frustrated.


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