Gallstone

A gallstone, also called a shav-stone, is a (stone) formed inside the gallbladder. Gallstones may pass into other parts of the biliary tract. If the stones pass out of the gall bladder they may cause extreme pain, which requires surgery or other treatment.
Cause of Gallstones.
Gallstones are solid particles that form in the gallbladder, a small organ located in the abdomen. They are made up of cholesterol, bile pigments, and other substances found in bile.
The main cause of gallstones is an imbalance in the substances that make up bile. When the levels of cholesterol and other substances in bile become too high, they can form solid particles. This can occur due to a variety of factors, including:
It is important to note that not all people who have gallstones will experience symptoms, and some people may develop gallstones without any known risk factors.