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Tuesday, 21 October 2025 00:00

Causes and Symptoms of Runners Toenail

Runner’s toenail, also known as a subungual hematoma, is a common foot injury among people who run long distances or engage in sports that involve frequent stopping and starting. Runner's toenail occurs when repeated impact causes the toenail to hit the front or top of the shoe, or when toes rub against each other, leading to bleeding beneath the nail. The big toe is most often affected, but any toe may be involved. Symptoms may include dark red or black discoloration of the nail, pain, swelling, pressure under the toenail, or even loss of the nail if it becomes loose or damaged. Running downhill or in hot weather, which makes the feet swell, often increases the risk. A podiatrist can diagnose the cause, provide treatment, and help prevent ongoing nail damage. If you have symptoms of runner’s toenail, it is suggested that you schedule an appointment with a podiatrist for an exam and appropriate treatment.

All runners should take extra precaution when trying to avoid injury. If you have any concerns about your feet, contact Mark Poplawski, DPM of Jersey Shore Podiatry, LLC. Our doctor will treat your foot and ankle needs.

How to Prevent Running Injuries

There are a lot of mistakes a runner can make prior to a workout that can induce injury. A lot of athletes tend to overstretch before running, instead of saving those workouts for a post-run routine. Deep lunges and hand-to-toe hamstring pulls should be performed after a workout instead of during a warmup. Another common mistake is jumping into an intense routine before your body is physically prepared for it. You should try to ease your way into long-distance running instead of forcing yourself to rush into it.

More Tips for Preventing Injury

  • Incorporate Strength Training into Workouts - This will help improve the body’s overall athleticism
  • Improve and Maintain Your Flexibility – Stretching everyday will help improve overall performance
  • “Warm Up” Before Running and “Cool Down” Afterward – A warm up of 5-10 minutes helps get rid of lactic acid in the muscles and prevents delayed muscle soreness
  • Cross-Training is Crucial
  • Wear Proper Running Shoes
  • Have a Formal Gait Analysis – Poor biomechanics can easily cause injury

If you have any questions, please feel free to contact our office located in Toms River, NJ . We offer the newest diagnostic and treatment technologies for all your foot care needs.

Read more about Preventing Running Injuries