- 30 or 40, when cell renewal slows down. Dryness or small bumps can also cause lines on your fingernails, making you feel embarrassed when people look at your hands.
But sudden, deep vertical lines on your fingernails can indicate more.
The natural aging process,
dehydration or dry skin, or
genetics playing a role. - Horizontal lines on your fingernails (Beau’s lines)
Imagine a teacher named Sarah suddenly seeing deep horizontal grooves appear on her nails. These lines on your fingernails, called Beau’s lines, indicate that nail growth has stopped for a short time.
Lines on your fingernails: what they might reveal about your health
