I think you are right there Shelley. Like you I have seen these type of patients here and there, mainly young females and often the result of being put in the plaster cast. I used to break my back and mind trying to restore range, perhaps to the point of over treating the area and perhaps therefore over-focusing on the issue. This all may well have fed into the problem if it is one of a central nature.
Perhaps reassuring the client that this can be a normal response and to review it every 3-4 weeks might be an interesting approach? 8o