Fingernail ridges are visible lines or grooves on the nail’s surface. They can run vertically from the cuticle to the tip of ...

Beau’s lines are transverse grooves in the nail, says Azzawi. They result from a recent temporary disturbance in the body, such as an acute trauma or viral illness, she says. Clubbed nails occur ...

The NCBI writes that if growth of the grooves is “abrupt, [it] indicates a sudden attack of disease.” And, when present on ...