Popping shoulder
If reaching for the top cabinet causes a loud pop, you may have an inflamed shoulder joint. Repetitive overhead movements, like dusting high shelves, can lead to inflammation in the bursa (the small fluid-filled sac) between the rotator cuff tendons and the shoulder blade tip, resulting in a pop. The sound usually disappears by itself. Pain with popping, however, could indicate a tear in the cartilage along the shoulder socket-in this case, see an orthopedist.