This pain is due to swollen capsule over the shoulder joint. You should take Ibuprofen
tablets if the pain is severe and give rest to the shoulder joint that will be fine over a period of 02 to 03 weeks. There is nothing to worry about if the pain doesnot respond after 03 weeks you should have an MRI
of shoulder joint for any tendon rupture or swollen joint.
I hope I am sucessful in solving your query If u have further you can ask me
Get well soon
Dr. Azhar Sattar