Shoulder pain may also result from arthritis. There are many types of arthritis, but generally it involves wear and tear changes with inflammation of the joint, causing swelling, pain and stiffness. Arthritis may be attributed to sports or work injuries.
People will often avoid shoulder movements in an attempt to lessen the pain arising from these conditions. Unfortunately, this can lead to a tightening or stiffening of the soft tissue parts of the joint, resulting in a painful restriction of motion.