Plicatured toe nails, also known as folded up toe nails, are a form of toe nail abnormality that may affect individuals of any age and genders. This condition is usually described as the appearance of several crosswise ridges or folds on the surface of the toenail. https://articlebiz.com/article/1052041687-what-are-plicatured-toe-nails-and-what-can-be-done-about-them