Hi ,sorry to hear about your mothers frozen shoulder,or possible one I had both shoulders frozen,righr first then the left after a year, GP said to me it was nothing to do with D..... just one of those things,Anyway got sent to physio,they gave me pulley and rope with excercises to try and keep it from seizing up totally,dont know if that helped,After 3 yrs its gone,as previously stated in another post,the 3 stages,Doc gave me Diclophenic ( pain and inflammitry pills to take,think I took them for first 6 months,There are all sorts of treatment for this all depending on the severity of pain,Hope she is on mend soon.