AC joint: While there are many causes for painful bumps around the shoulder, one of the most common is a painful ac or acromioclavicular joint. It is the joint that connects the clavicle to the scapula and can often become separated or arthritic causing pain.
Answered 12/1/2016
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Depends on history -: Whether there is an injury to the shoulder blade area or not; in which it could be a fracture or a pulled/torn muscle. Rarely a tumor of the bone or muscle, blood vessel or nerves, or a ganglion cyst, can present a swelling ( a bump). See your doctor to be properly diagnosed.
Answered 9/16/2013
4.9k views
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