Which nail disorder can cause nails to separate from the nail bed?

• A. Onycholysis
• B. Beau's lines
• C. Onychorrhexis
• D. Hypertrichosis

Answer: (A)

Onycholysis is the correct answer because it specifically refers to the condition where the nail separates from the nail bed. This detachment can occur at any part of the nail, but it is most commonly seen at the tip. Onycholysis can be caused by various factors, including trauma, fungal infections, and exposure to chemicals, leading to the visible lifting of the nail and potentially making it more susceptible to further damage or infection.

Beau's lines, while related to the appearance of the nail, indicate temporary pauses in nail growth often due to systemic health issues rather than separation of the nail from the bed. Onychorrhexis refers to brittle nails characterized by longitudinal ridging, which can lead to splitting but does not involve separation from the nail bed. Hypertrichosis involves excessive hair growth and is unrelated to any nail condition, including onycholysis. Understanding the specific characteristics of nail disorders helps in accurately identifying and managing them.