From scratching your back to painting or playing sports, your shoulder can let you move further and in more ways than any other joint. But this flexibility also makes the shoulder unstable and likely to get injured, especially from sports, physical work, and accidents. Shoulder arthritis and inflammation from wear and tear over time are also common.
Shoulder problems can be very painful and make it hard to move. Some problems only hurt when you move your shoulder. Others hurt all of the time.