Which condition is characterized by the lifting of the nail plate, usually at the free edge?

The condition characterized by the lifting of the nail plate, particularly at the free edge, is known as onycholysis. This phenomenon occurs when there is a separation between the nail plate and the underlying nail bed, leading to a visible gap. This separation can be triggered by various factors, such as trauma, fungal infections, or exposure to certain chemicals.

Onycholysis is particularly observable as the nail grows out, where the free edge begins to lift and might become discolored and more susceptible to damage or secondary infections. Recognizing this condition is crucial for nail technicians and beauty professionals, as it can indicate underlying health issues or improper nail care practices.

The other conditions listed do not describe the same symptoms associated with lifting of the nail plate. For instance, onychocryptosis refers to an ingrown toenail, onychia pertains to inflammation of the nail matrix often leading to nail loss, and nail psoriasis describes a condition that can cause pitting and nail changes, but does not typically involve the lifting of the nail plate in the same manner as onycholysis. Understanding these distinctions is essential for proper diagnosis and treatment in nail technology.