He is probably putting food inside its cheeckpockets. Nothing to worry about.
it starts to die and swell up
Your tonsils swell up and might have a white film on them in dots
your cells will swell up and will lyse. this is a common way for drowing to occur.
They will take a while to heal up if not visit a vet
Soon to be momma hamsters look as though they've eaten half a stack of graham crackers all at once. That is, their abdomens swell up well beyond there normal size. Otherwise, they look like they always do.
They will kill eachother. You will end up losing both of those hamsters if you keep them together so my advice is to seperate them immediately!
Their inside swell up until they bust open.
they swell up and become pregnant magpies, when they give birth, it is to miniture dragons
Your Lungs could swell up or your stomache could bleed. Mine did. Nothing Serious though.
it could either swell up or trun black if it looks bad seek medical attention or if nothing happens its fine
your nipples often swell up when you are cold, and often tickling them helps
You should give them treats when they do something right, like for "up", you hold a treat above their heads and when they stretch up for the treat, you praise them and give them the treat. If you are consistent, you can train the hamster.