Medically reviewed by William Truswell, MD Key Takeaways Vertical ridges in nails are usually harmless and may become more noticeable with age.Sudden or worsening ridges should be checked by a ...

If you have noticed lines that appear like grooves or indentations running horizontally across your fingernails or toenails, you may be wondering what's going on. These are known as "Beau's lines." ...