If someone were to injure their shoulder, should they rehab the elbow as well? Or vise versa?

Any injury caused to the shoulder can also affect the elbow.

Explanation:

The tendon located in the shoulder which facilitates the bending of the elbow and also aid in turning the forearm if get overused or injured will result in the inflammation. This inflammation will appear in the front side of the shoulder and it can affect the functioning of elbow as the elbow will no longer will able to bend and forearm may experience pain. So, any injury caused to the shoulder can also affect the elbow.

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