What is shoulder instability?
"Shoulder instability" is what doctors say you have when your shoulder goes a little out of place or feels like it might. "Instability" means that the shoulder bones aren't stable--they aren't held together as tightly as they should be.
Source
Shoulder Instability in Young Athletes by BL Mahaffey, M.D., and PA Smith, M.D. (American Family Physician May 15, 1999, http://www.aafp.org/afp/990515ap/2773.html)
Written by familydoctor.org editorial staff
Reviewed/Updated: 12/10
Created: 09/00