Which condition involves splitting or separation of the nail from the nail bed?

Onycholysis is the condition characterized by the splitting or separation of the nail from the nail bed. This separation can occur due to various factors such as trauma, fungal infections, or certain systemic conditions. When onycholysis occurs, the nail plate becomes detached, which may expose the sensitive nail bed beneath.

Understanding onycholysis involves recognizing that it can lead to discomfort, increased susceptibility to infections, and may indicate underlying health issues. Conditions like onychogryphosis involve abnormal nail growth (often thickening and curling), while athlete's foot is a fungal infection primarily affecting the skin of the feet rather than the nails. Psoriasis can affect the nails but typically presents with pitting and unusual nail textures rather than separation from the nail bed. Thus, onycholysis distinctly and directly relates to the issue of nail detachment.