Shoulder arthritis is inflammation with your shoulder joint that occurs due to cartilage loss. The inflammation causes pain, stiffness and problem in executing your day by day things to do.  Causes of Shoulder Instability / Dislocation Shoulder instability and dislocation can occur as a result of a number of causes, https://www.theorthopaedicandpainpractice.com/what-are-shoulder-joint-dislocations/?_gl=1*164kc8h*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB