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.
Other Common Causes of Joint Pain. Conditions other than arthritis that can cause joint pain include: 1  bursitis (inflammation of the cushioning pads around joints). 2  lupus. 3  gout. 4  certain infectious diseases (such as mumps, influenza, and hepatitis).5  chondromalacia of the patella (breakdown of the kneecapâs cartilage). 6  injury.7  tendinitis (inflammation of the tendon).ther Common Causes of Joint Pain. Conditions other than arthritis that can cause joint pain include: 1  bursitis (inflammation of the cushioning pads around joints). 2  lupus. 3  gout. 4  certain infectious diseases (such as mumps, influenza, and hepatitis).