Health Library
The Health Library is a collection of health and wellness resources created for learning and accessibility. Select a topic below for related health information or search for a topic in the search bar for more information on other medical conditions.
Color Changes in Nails
-
Color changes occur in nails for many reasons. A black nail may be caused by an injury. Bleeding or bruising under an injured nail will cause a black or purplish appearance. You may need to have the blood drained from under the nail. The black appearance will most often go away as the injury heals, but this may...