Sports injuries will be the primary reason for posterior instability/ tears. They are often observed in youthful active clients. Sports like fat-lifting, baseball, tennis or volleyball and so forth are widespread causes of this injury. AC joint dislocations are categorised into diverse grades. Grade I may demand rest and therapy, https://www.theorthopaedicandpainpractice.com/is-my-shoulder-pain-caused-by-an-acromio-clavicular-dislocation/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB