Deformed or thickened toenails—often discolored yellow, brown, or black—are more than just a cosmetic issue. They can be painful and indicate underlying problems like persistent injury or fungal infection.

Whether caused by tight footwear or the common Athlete’s Foot fungus, prompt attention is crucial for healing and preventing recurrence.

Understanding the Cause

Deformed nails (medically known as Onychodystrophy) typically result from one of three issues:

1. Fungal Infection (Onychomycosis): The most common cause. Fungus thrives in the warm, moist environment of socks and shoes, leading to thick, brittle, and discolored nails.

2. Trauma: Repeated micro-trauma from running, tight shoes, or an old injury can permanently damage the nail matrix (the growth center).

3. Underlying Conditions: Psoriasis, eczema, or circulatory issues can also affect nail growth