What is the medical term for "nail fungus"?

• A. Onychomycosis
• B. Paronychia
• C. Koilonychia
• D. Leukonychia

Answer: (A)

The medical term for "nail fungus" is onychomycosis. This condition is characterized by a fungal infection that affects the nails, primarily the toenails, but it can also occur in fingernails. Onychomycosis causes various changes in the appearance of the nail, including discoloration, thickening, and possible separation from the nail bed. It is a common condition that can lead to discomfort and may require antifungal treatment for resolution.

Other terms mentioned refer to different nail disorders. Paronychia is an infection of the skin around the nail, which can result in swelling, redness, and pain. Koilonychia describes nails that are spoon-shaped and may be associated with underlying health issues, such as iron deficiency. Leukonychia refers to white spots or lines on the nails, often caused by trauma or minor injuries to the nail, rather than a fungal infection. Thus, onychomycosis is uniquely defined as the fungal infection itself, making it the correct answer in this context.