hi, as you mentioned you have a old history of surgery of the shoulder what surgery was it? based on that it will be possible to give inputs. Also as you said the pain is a older ones I will recommend you to do some static neck exercises followed by shoulder girdle Strengthening exercises. Perform the upper limb strengthening exercises as well. Now since the old history of surgery is unknown there are two possibilities - either the pain is due to the Nerve getting pinch in the nerve or either it is due to muscle weakness of the shoulder girdle. But in either of the case to keep into consideration I have recommended exrrcises for both. Also to understand that most pains in body is due to alteration happening in the normal anatomical position of the joints. And this thing can be corrected by only performing exercises as muscles support the bones and the joints in the normal anatomical position. Also, a physical therapist will help you with ultrasound therapy and TENS therapy for pain. This is the try you can perform before thinking further on the surgery aspect. As with physical therapy there is a mass reduction in pain and also strength in the muscles . Once the joint is stabilized by the muscle post strenthing the Need for the surgery is reduced. with the grace of God I wish you a good health. regards Jay Indravadan Patel