Skilled Remedial Massage is most appropriate for such a situation. The various insertions to the humerus are reachable and, when loosened off, it is possible to ease tightness around the scapula. Working thoroughly into the whole shoulder area provides much relief, along with specific stretches to the shoulder and surrounding fascia. It's difficult to be accurate without seeing the situation but massage would be your best option, providing the practitioner has good A & P knowledge.
Angela
http://www.in-form.co.uk07900 168996
Comments
I keep topping up because it's really relaxing too, this month she is only charging £35
http://www.bowen-hydrotherm-massage.co.uk/