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Nail Bed Hyperkeratosis (or subungual hyperkeratosis) is the accumulation of scales under the nail plate, which is then detached and uplifted. The nail bed often appears thickened. It is usually a reaction to something. In the nail industry, it can be caused by a primer, a bonder, monomer liquid, liquids used in combination with an acrygel, heat spikes, or an undercured product. The keratinization that is hyperkeratosis, is a defense …
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