Yes, it could be either of those... could also be a problem in the neck with the nerve that supplies the arm being pinched.
However, more likely a shoulder problem.
Have you had Xrays?
Do you remember a specific injury?
it's not obvious to me what this injury is and it certainly could be inflammation that will go away on it's own, but does it hurt when you raise your arm above your head or if you try to lift things above shoulder height?
okay, so I think this
if you are continuing to experience symptoms and they are not improving you are at the time frame where it will be necessary to get a little more exploration of your injury.
the first thing is xrays and the second thing is probably physical therapy
it does not sound like you need an MRI from what you are saying
and that your shoulder is bothersome but not unstable
so I think surgery is not likely
and I think this is something that can be reahabilitated
with the proper treatment
does this make sense?
you need an Xray as a 'baseline study'... it probably wont give us an answer but is important because SOMETIMES it DOES given an answer (calcium buildup in the joint for instance)
but more importantly
because it takes rare bone problems that are dangerous off the list, and it allows the radiologist to do a better read of the shoulder MRI should you need one in the future.
the MRI is the key in most significant shoulder injuries
as it shows all structures in the shoulder in 3D
and a diagnosis is often made on the MRI, which requires a plain film Xray first
that's good to know... that helps but a CT does not show herniated discs ... an MRI does... but I don't think a disc is your problem
glad your CT scans were normal
sounds like they were worried about lymphoma or something like it
glad it was okay
I think so, could be a labral tear (cartilage inside the shoulder joint) or a minor rotator cuff injury.
sounds to me like something that with proper physical therapy can be brought back to normal.
that's a good idea
do you have any final questions for me about this?
you are most welcome
good luck rehabbing your shoulder
should you need my assistance in the future simply start your question with 'for 911doc'
and I am on most days
positive feedback always appreciated
be well and thanks again