Depends: You could have a boil or it could be a cyst or ganglion off the joint. In your age it probably is more a skin problem and less related to the shoulder but if you have concerns would advise medical evaluation.
Answered 11/28/2017
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3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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