Thanks for writing to us.
From your description, an injury
or inflammation involving internal structures of the shoulder joint like capsule or tendonitis
is likely. MRI
scan is needed to know the exact cause and extent of involvement so that proper treatment can be initiated.
I hope this information has been both informative and helpful for you. You can consult me again directly through my profile URL http://bit.ly/Dr-Praveen-Tayal
Dr. Praveen Tayal