Most toenail injuries occur when an unprotected toe strikes a hard surface, or when an object is dropped on the toe.

Causes include:

• Sports
• Occupational injuries
• Household injuries

Types of toenail injuries include:

• Subungual hematoma:
• Collection of blood under the toenail
• Avulsion of the growth plate:
• Disruption of the tissue that is responsible for nail growth