Direct Answer • Key Takeaway
The Most Common Cause of Onycholysis Is Trauma. Even Slight Trauma Can Cause Onycholysis When It Happens Repetitively — for Example, the Daily Tapping of Long Fingernails on a Keyboard or Counter. Onycholysis Also Can Be Caused by Manicure Tools That Are Pushed Beneath the Nail to Clear Dirt or Smooth the Nail.
