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Onycholysis is a condition that causes nails to separate from the nail bed beginning at the distal end of the nail (under the free edge). The nail itself will appear healthy, often maintaining its shape and strength. Techs will be able to see the separation easily on natural nails and through light-colored enhancement products.
Repeated trauma to toenails, caused by ill-fitting shoes, can lead to deformities in the nails. The deformities may resemble a fungal infection; nails can be thickened or discolored and can lift away from the nail bed, which causes cosmetic concerns. Habits such as nail biting and cuticle biting also can cause trauma to the nails. Nail biting is a main cause of acute paronychia, a type of infection in which bacteria get underneath the tissue at the side of the nail and cause swelling and irritation.