What are white spots on the nail caused by a small separation between the nail and the nail bed called?

The phenomenon of white spots on the nails due to a small separation between the nail and the nail bed is referred to as leuconychia. This condition can occur for various reasons, including minor trauma to the nail, allergic reactions, or systemic health issues. Leuconychia is essentially characterized by the appearance of white discolorations on the nails, which can vary in visibility and pattern based on the underlying cause.

Other terms, while related to nail health, describe different conditions. For instance, onychomycosis refers specifically to a fungal infection of the nails, affecting their thickness, color, and integrity. Onychoschizia describes the splitting or layering of the nail, often due to dryness or excessive exposure to chemicals. Onycholysis, on the other hand, indicates a complete separation of the nail from the nail bed, which is a more severe condition than what is implied by leuconychia. Hence, leuconychia is the correct term for the described white spots resulting from separation at a mild level.