Hi there,This is Dr Basu, experienced Internal Medicine Specialist.I am here to address your concerns and provide great service.
This is likely due to the inflammation of the supraspinatus tendon.
Supraspinatus is a major rotator cuff muscle supporting the shoulder joint.
Corticosteroid injection in the joint should help reducing the inflammation.
Physiotherapy should be considered as well.
Please consult with a shoulder specialist.Best wishes,It was my pleasure to help you today.If I have answered all your questions, Please rate my response Excellent (click on the 5th star on top).Please bookmark my profile for fast, reliable authentic answers!This is the link to my profile:http://www.justanswer.com/medical/expert-mysticdoc/