MadSci Network: Medicine
Query:

Re: What causes white spots to appear on fingernails?

Area: Medicine
Posted By: Bruce Lobitz, M.D., Emergency Medicine, Aiken Regional Medical Center
Date: Sun Sep 21 00:38:16 1997
Area of science: Medicine
ID: 873938163.Me
Message:
     White spots on the fingernails are caused by small dents in the nail 
itself.  If something hits your nail it can dent the tissue underneath, the 
nailbed.  A small area then gets retracted from the nail, causing a white spot.  
If the trauma is much bigger, the nailbed may bleed underneath, causing a black 
spot.
     There are some diseases which can cause the nail to grow impaired or 
colored, but white spots are not one of them.

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