Minor damage to the matrix that produces a whitish discoloration or white spots on the nails is:

The condition described, where minor damage to the nail matrix results in whitish discoloration or white spots on the nails, is referred to as leukonychia. This condition occurs when the matrix, the tissue that generates the nail, is injured or affected, leading to temporary changes in how the nail grows. The white spots usually appear as the nail grows out and can be caused by various factors, including trauma or inadequate nutrition.

Leukonychia can manifest in different forms, with the most common being "leukonychia striata," which presents as white lines or spots along the nail. It is distinct from other conditions, such as nail fungus, which causes discoloration caused by fungal infections, and melanonychia, which involves dark pigmentation of the nail due to increased melanin production. Understanding leukonychia is important for recognizing how minor trauma can affect nail health, guiding proper care and treatment.