Which statement about onychomycosis is true?

Which statement about onychomycosis is true?

• A. It is caused by fungus
• B. It is caused by biting the nail
• C. It only affects fingernails
• D. It cannot be treated

Answer: (A)

Onychomycosis is a fungal infection of the nails. The key truth is that it is caused by fungus, typically dermatophytes, which invade and grow in the nail unit and disrupt normal nail formation. This fungal origin explains the common signs like thickened, discolored, and brittle nails and guides treatment toward antifungal medications. Biting the nail is a form of trauma and can contribute to nail problems or bacterial infection, but it is not the cause of onychomycosis itself. The condition can affect both toenails and fingernails (though toenails are more commonly involved). And despite its sometimes stubborn course, it is treatable with antifungal therapy, though treatment is often prolonged and may require a combination of topical and oral medications.

Onychomycosis is a fungal infection of the nails. The key truth is that it is caused by fungus, typically dermatophytes, which invade and grow in the nail unit and disrupt normal nail formation. This fungal origin explains the common signs like thickened, discolored, and brittle nails and guides treatment toward antifungal medications.

Biting the nail is a form of trauma and can contribute to nail problems or bacterial infection, but it is not the cause of onychomycosis itself. The condition can affect both toenails and fingernails (though toenails are more commonly involved). And despite its sometimes stubborn course, it is treatable with antifungal therapy, though treatment is often prolonged and may require a combination of topical and oral medications.