Chemotherapy
Malnutrition
Major stress or trauma
If you notice horizontal ridges, see a doctor.
The Bottom Line
Those vertical lines on your nails are usually nothing to worry about. They're simply a sign that you've lived long enough for your nails to show it—like laugh lines for your fingers.
Your nails are telling the story of your life. Most of the time, that story is perfectly normal.
But if you notice sudden changes, unusual patterns, or other symptoms, it's always worth a conversation with your doctor.
