After you turn forty, you often look at your hands and notice something new: subtle vertical lines running from the cuticle to the tip. They can appear slowly, nail by nail, or suddenly appear everywhere. Some people are immediately concerned about them. Others see them as a cosmetic change. The truth lies somewhere in between. These lines, often called vertical lines, are common, but not without significance. They’re your body’s quiet way of revealing what’s going on beneath the surface.
