Onycholysis

What is onycholysis?

Onycholysis is a common nail disorder in which the nail plate has separated from the nailbed typically resulting in a well-defined area of white opaque nail. It may be idiopathic or secondary to trauma, skin disease, nail infections, tumours, or systemic events. Photo-onycholysis is due to ingestion of a photosensitiser, such as a medication [see Drug-induced photosensitivity].

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Source: dermnetnz.org