Cholecystolithiasis, Choleliths, Cholelithiasis, Biliary colic, Gallstones, Gallbladder calculus. Root Cause of Disease Gallstones are hardened deposits of digestive fluid that can form in your gallbladder. Gallstones are developed because of an imbalance in the chemical makeup of bile inside the gallbladder. The levels of cholesterol in bile become too high and the excess cholesterol forms…