The nails (including the toenails) of a client with YNS will have some or all of these characteristics: They will be thicker than normal and they may have a dark, greenish edge. They will grow slower than normal. A secondary result of the slow growth will be ridges or lines in the nails. There will be a pronounced, almost exaggerated curve to the nails. All the nails will be affected. Some of the nails may have onycholysis (separation of the nail plate from the nail bed), and the cuticle will be absent.