"Cheek pouches" refers to the pockets in the cheeks of certain animals. These specialized pockets are used for storing food or carrying things around. Full definition
For nesting material, any fluffy types of bedding should be avoided as they can become stuck in cheek pouches and your hamster can potentially get caught in the fibers. (yourpethamster.com)
These sticky, sugary fruits can also increase your hamster's chances of developing impacted cheek pouches. (petconsider.com)
You can also prevent wound occurring in the first place by acting to protect your hamster from injuries such as broken bones and cheek pouch injuries. (yourpethamster.com)