question: My girlfriend went to the Hospital  the other day and they said her gallbladder is the size of a fart. but it may be because she had just ate 2 hours before.. What causes gallbladders to shrink? And she thinks that it isnt her gallbladder at all and is her kidneys because the pain is now moving to the back near her kidneys but still in the original spot with stabbing pains near her gallbladder. What do you think?