What is a primary characteristic of Tinea Unguium?

Tinea Unguium, also known as onychomycosis, is primarily characterized as a fungal infection that affects the nails. This condition is caused by various types of fungi, which can invade the nail bed and nail plate, leading to various symptoms such as discoloration, thickening, and potential detachment of the nail. Understanding that it is fundamentally a fungal infection is crucial, as this distinguishes it from other nail disorders caused by bacteria or trauma.

The other characteristics, such as yellowing and brittleness, are common symptoms of Tinea Unguium but they are not defining features that identify it as a condition. Blue discoloration is not associated with Tinea Unguium and usually indicates different underlying issues. Therefore, recognizing it as a fungal infection is the most accurate and essential characteristic when diagnosing and understanding this nail condition.