Youâve probably seen posts claiming: âIf you have lines on your nails, it means you have cancer or a serious disease.â That kind of statement spreads quickly online because it sounds dramatic and alarming.
But the truth is far more nuancedâand in most cases, nail lines are completely normal and harmless.
Letâs break it down clearly so you know whatâs real, whatâs not, and when you should actually pay attention.
 First: What are lines on nails?
Nail lines can appear in different forms:
 Vertical ridges
Lines that run from the cuticle to the tip of the nail.
 Horizontal lines (Beauâs lines)
Indentations or grooves that go across the nail.
These changes are usually linked to how the nail grows, not something dangerous on their own.