In my opinion u must go for physiotherapy sessions so that the shoulder gets mobilised slowly and steadily... one important thing want to know wether ur mom is suffering from
diabetes if not kindly do go for a blood test known as
hba1c...to know wether she is suffering from diabetes or not.. as in diabetic cases frozen shoulder is very common and takes time as well...there is no need of surgery...get well soon take care
Next Steps
Visit a Orthopedics and after that start doing physiotherapy
Health Tips
Do not lie on affected side
Hot fermentation is a must 2 to 3 times a day one time before going to bed is a must
In excessive pain take tab. Ultracet sos
U can take before going to bed to avoid pain at night