Lichen simplex chronicus

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Science and technology

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What Wikipedia says

Lichen simplex chronicus (LSC) is thick leathery skin with exaggerated skin markings caused by sudden itching and excessive rubbing and scratching. It generally results in small bumps, patches, scratch marks and scale.

Excerpt from the Wikipedia article “Lichen simplex chronicus”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: kilbad (talk), CC BY 3.0, via Wikimedia Commons.