What causes nail fungus?

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    Last Updated: May 16, 2025

    Nail fungus is caused by fungal infections that thrive in dark, warm, and moist environments. Wearing wet shoes frequently can increase the risk of developing this condition.

    Fungal infections can occur anywhere on the body and typically develop in dark, warm and moist environments. For instance, if one is constantly wearing shoes that often get wet, this may increase the risk of developing nail fungus.[1]