“The horizontal ridges are called Beau’s Lines [deep grooved lines that run from side to side on the fingernail or the toenail]. If the white moon at the bottom of the nail is ...
“Leukonychia is a condition where people get these white dots or lines on their fingernails,” says Karan Lal, D.O., M.S., F.A.A.D., double board-certified dermatologist with Affiliated ...