Green cheek conure has a peach colourd sack on its chest?

between my parrots stomach and head there is a partially big peach colours sack under his feathers.

He lets me touch it and it doesn't look like its painful.

The parrot is very very trusting towards me so i can't tell if he lets me touch it cause he trusts me but it causes him pain or if it doesn't cause him pain regardless.