What is Onycholysis?
Onycholysis refers to the painless detachment of the nail from the underlying nail bed. While it most commonly affects the fingernails, it is a frequent occurrence in toenails, often manifesting as a white or yellow area where the nail has lifted.
Onycholysis vs. Toenail Fungus
It is critical to distinguish between these two conditions, as the treatments are fundamentally different.
Onycholysis
- Usually painless unless infected
- Nail remains smooth and thin
- Clean separation from bed
- Often caused by trauma or shoes
Toenail Fungus
- Nail becomes thick and brittle
- Debris (keratin) builds up underneath
- Foul odor is common
- Progressive discoloration
Common Causes of Toenail Lifting
The most frequent cause of onycholysis in the feet is repetitive micro-trauma. This often occurs when toes are repeatedly jammed against the front of running shoes or tight-fitting dress shoes.
- Chemical Irritants: Excessive use of nail polish removers or exposure to harsh cleaning agents.
- Skin Conditions: Psoriasis of the nail is a leading cause of spontaneous onycholysis.
- Medications: Certain antibiotics (tetracyclines) can cause photosensitivity, leading to nail lifting.
Treatment & Management
The key to managing onycholysis is to keep the area dry. Moisture trapped in the pocket between the nail and the bed is a breeding ground for bacteria and fungi (leading to "Green Nail Syndrome"). We recommend trimming the detached portion of the nail carefully and avoiding aggressive cleaning under the nail.
Patient Frequently Asked Questions
Q Will a detached toenail re-attach?
Q Can I wear nail polish with onycholysis?
Related Clinical Topics
Nail Fungus
The most common secondary infection that occupies the empty space of onycholysis.
Pincer Nails
Extreme nail curvature that can physically force the nail to lift from the bed.
Green Nail Syndrome
A bacterial infection (Pseudomonas) that frequently colonizes detached nails.