Shoulder pain can stem from one or more of the following causes: 1  Strains from overexertion. 2  Tendonitis from overuse. 3  Shoulder joint instability. 4  Dislocation. Collar or upper arm bone fractures.  Frozen 1  shoulder. Pinched nerves (also called radiculopathy)
Joint pain can affect one or more joints. Joint pain can be caused by many types of injuries or conditions. It may be linked to arthritis, bursitis, and muscle pain. No matter what causes it, joint pain can be very bothersome. Some things that can cause joint pain are: Autoimmune diseases such as rheumatoid arthritis and lupus.
Joint stiffness can be caused by injury or disease of the joint and is a common finding in the arthritis conditions. Joint damage, including stiffness, can also occur following injury to the joint. Sometimes injuries or inflammation of the adjacent areas, such as bursae, can cause pain that may limit the movement of a joint and be perceived as joint stiffness. Joint pain is also referred to as arthralgia.