In this video, Dr. Johanna Youner, board-certified podiatric surgeon and a Fellow of the American College of Foot and Ankle Surgeons, explains that the real cause of toenail fungus is not moisture, but injuries to the nails that cause them to become vulnerable. Trauma to the toenail can include bruising or damage caused by improper footwear as well as athletic activities such as running and skiing. In order to prevent an infection, people with injured or painful nails should see a podiatrist, who can help them by painlessly thinning the injured toenail and releasing any trapped blood.

For more from Dr. Youner, visit her website

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