Did it heal. Has it always been painful? Did it heal? Did it just begin to hurt again? Where exactly does it hurt. More info needed.
Mal-union. Is not normal to continue with pain unless the bone has developed a mal union or a non union, if that is the case need to be corrected.
Ligament injury. You probably injured the ac joint ligaments and that is the residual problem. Prolotherapy can help you, visit www. Getprolo. Com or www. Aaomed. Org to learn about prolotherapy and find a doctor.