Our Best Gastro Surgeons in Bangalore - Dr. Ravishankar K S, Consultant- Laparoscopic GI & General Surgery talks about Gallstone Diseases. Gallstones are hardened deposits of digestive fluid that can form in your gallbladder. Your gallbladder is a small, pear-shaped organ on the right side of your abdomen, just beneath your liver. The gallbladder holds a digestive fluid called bile that's released into your small intestine.