Horizontal nail ridges (Beau's lines): Horizontal ridges, also known as Beau's lines run across the nail and may indicate an underlying condition. They can result from interrupted nail growth due ...

Note: thicker lines that create a horizontal stripe on the nail are called Beau's lines, which are often symptoms of a more ...

Also known as Beau’s lines, they could signal disease or just be a remnant of an old injury, says Dr. Lee. “They arise ...