Medically reviewed by Susan Bard, MD Melanonychia, a black line on your nail, can be a sign of melanoma or benign ...

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." ...

Fingernails, often overlooked, are biological indicators of health. Conditions like clubbing, white flecks (leukonychia), ...

A disappearing nail bed is a reduction of the nail bed, or skin beneath your nail. Injuries, infections, and certain health conditions are all possible causes. A nail bed consists of the skin directly ...

If you’re wondering how long you’ll live, the answer could be right at your fingertips. According to Dr. David Sinclair, a professor of genetics at Harvard Medical School, your nails are actually a ...