Here are possible causes of white spots on nails: Injury Injury to the nail plate or matrix is one of the most common causes of leukonychia, says Shari Lipner, MD, ...

White spots on fingernails, called leukonychia, can have a variety of causes—from small cosmetic issues to major, life-threatening illnesses. Luckily, it’s rarely the latter.

White spots on nails, also known as leukonychia, are usually harmless but may indicate a medical condition. Dermatologists explain common causes and treatment.