Maybe because she/he is maybe dying or if it's a girl it might be pregnant. My hamster, Ginger has swolen private parts. she might be pregnant because she was on top (or under) a boy/girl hamster. so just take time. if it doesn't heal within 1 month call an "excotic vet"
you have boy hamsters? if so those are the balls...hahaha
females dont have the bugle in the back...
it is nature
poop
none
Out of his butt.
Yes. Out their butt.
She's menstruating.
yes not sure what it is called but it means your hamster it going to die
um.... no i wouldn't think so....
No
Stick them in the same cage over night
if you have just cleaned it out it may have banged its nose or if you have to hamsters they may be trying to kill each other
Approximately 8.
It may be the male hamsters testies or if it is female it may be a tumor.