Leukonychia (or Leuconychia, also known as "White nails" ) is a medical term for white discoloration appearing on nails. It is derived from the Greek words Leuko white and Onyx nail. The most common cause is injury to the base of the nail (the matrix) where the nail is formed. A rare nail disorder where the whole of the nail is completely white at birth
A doctor will take a thorough medical history, and may test liver and kidney function. If a zinc deficiency is identified, a diet rich in zinc or zinc supplements may be administered.