Answer
For the digestion of a fatty meal,the gall bladder contracts significantly.This pressure, along with the blockage due to stone causes pain
Work Step by Step
Bile secreted by the liver is stored in the gall bladder and released later for the digestion of fats.For people with a gall stones,the gall bladder needs to exert more pressure to contact and release bile in response to a fatty meal.This triggers the pain.