Hi, Thanks for your query. Although it isn t possible to diagnose your mother condition without an examination and a few tests, her history is suggestive of Adhesive capsulitis(Frozen shoulder) or Calcifictendonitis. These conditions are easily managed by regular physiotherapy ( Range of motion exercices,stretching and strengthening exercises). Over-the-counter pain relievers, such as aspirin and ibuprofen (Advil, Motrin), can help reduce pain and inflammation associated with this condition. I would suggest getting this evaluated by an orthopedician nearby for an accurate diagnosis and appropriate management. Your doctor after diagnosing the condition might refer to her a physical therapist.A physical therapist can teach her stretching exercises to help maintain as much mobility in shoulder as possible I do hope that you have found something helpful and I will be glad to answer any further query. Take care