Ridged toe nails, also known as pincer toe nails, are a type of toe nail abnormality that may impact individuals of any age and genders. This condition is commonly described as the appearance of multiple 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