Shoulder arthritis is inflammation as part of your shoulder joint that happens on account of cartilage loss. The inflammation causes pain, stiffness and problems in doing your day by day things to do.  Muscle Imbalance: Muscle weaknesses or imbalances within the shoulder joint can boost the risk of instability. sixteen https://www.theorthopaedicandpainpractice.com/what-are-shoulder-joint-dislocations/?_gl=1*164kc8h*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB