What is one sign of a healthy nail?

A healthy nail typically exhibits a smooth surface that is free from ridges, spots, and discoloration. When nails are smooth and shiny, it indicates that they are well-moisturized and have not been subjected to trauma or underlying health issues that can affect their appearance. A uniform, shiny finish is a sign of good health, as opposed to those characteristics associated with problem conditions, such as roughness or visible blemishes. Therefore, the presence of smooth, shiny nails without ridges or discoloration is the hallmark of a healthy nail. This indicates proper nutrition, care, and absence of infections or other nail disorders.