4268. Everted cheek pouch

 A cheek pouch, also known as a cheek sac, is a pouch-like structure in the cheeks of dwarf hamsters and other hamster species. These pouches are used for storing food, allowing the hamster to collect and transport food back to its burrow or nest.

When a dwarf hamster's cheek pouch is "hanging" or everted, it means that the pouch is protruding from the hamster's mouth, often looking like a small, bulging sac on the side of its face. This usually happens when the hamster is storing food in its pouches, and they become full and visible