Black Toenail

Athlete's Foot

Relieving Pain & Preventing Nail Damage

Understanding Causes, Treatment, and Prevention

A black toenail is a common condition, especially among athletes and active individuals. The discoloration usually occurs when the toe repeatedly hits the inside or top of the shoe, causing bruising beneath the nail. This can also happen in anyone who wears shoes that are too tight or too small for an extended period of time.


The dark color is the result of dried blood trapped under the toenail. In many cases, it is not painful — but the damaged nail may loosen, lift, or fall off completely. Because trauma weakens the nail structure, it can also increase the risk of developing a fungal nail infection.


For patients with diabetes, any change in toenail color should be evaluated by a doctor right away. The pressure that causes bruising can also create a sore beneath the nail, which may lead to infection if not treated promptly.

Start Your Journey to Wellness Today

Talk With Foot and Ankle Specialist Today!

Ready to take the first step towards healthier, pain-free feet? Contact us to schedule an appointment or to learn more about our foot and ankle services. Our dedicated podiatric team is here to provide personalized care and answer any questions you may have about your lower extremity concerns. Reach out today and let us help you achieve optimal foot health and mobility for an active lifestyle.