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