From scratching your back to painting or playing sports, your shoulders let you move further, and in more ways, than almost any other joint in your body. At the same time, however, this flexibility makes the shoulders more unstable and more likely to get injured, especially from sports, physical work, or accidents. Shoulder arthritis and inflammation from wear and tear are also common, over time.
Shoulder injuries can be very painful and can make it hard to move and go about your daily life activities. Some injuries are only painful with movement, while others are constantly painful.