What symptom is commonly associated with gallstones when they become lodged?

The symptom most commonly associated with gallstones, especially when they become lodged in the bile ducts, is right upper quadrant pain that may radiate to the back. This pain is often referred to as biliary colic and is due to the inflammation and obstruction caused by the gallstones. When gallstones obstruct the bile duct, the gallbladder can become distended or inflamed, leading to significant discomfort in the right upper abdominal area.

This particular pain can also be felt in the shoulder or back, as the nerves in these areas can be affected by the same irritation. It is important to note that gallbladder pain is typically sharp and can come in waves, often triggered by the ingestion of fatty foods. Understanding the character and location of the pain is crucial for both diagnosis and effective management of gallstone-related complications.