Biliary Colic
Biliary colic is episodic pain caused by transient obstruction of the cystic duct by a gallstone without established gallbladder inflammation.
Despite the term colic, the pain is usually steady rather than intermittently cramping. Gallbladder contraction against an obstructed cystic duct raises intraluminal pressure until the stone disimpacts.
The distinction from acute cholecystitis is principally duration and inflammation. Biliary colic resolves when obstruction ends. Persistent obstruction produces gallbladder inflammation and acute cholecystitis.

