The stomach has the ability to stretch and grow due to its structure. Over time, frequent and excessive eating habits cause the stomach to grow and people to gain excess weight. During gastric reduction surgery, a large part of the stomach and the part where the hormones that cause hunger are produced would be removed. Therefore, after the operation, extreme hunger is not felt, and since the stomach shrinks, a small amount of food would be sufficient enough.
The feeling of nibbling is not much felt in the first few years. When the recovery is fully completed patients then could fill the stomach completely. Consuming food after reaching satiety, would result an expansion in the stomach.
However, despite all this, the stomach will not completely return to its former state.