It sounds like your hamster might have parasites, or a skin infection of some kind. Also check there is nothing rough or sharp in the cage that could cause injury.
It sounds like your hamster might have parasites, or a skin infection of some kind. Also check there is nothing rough or sharp in the cage that could cause injury.
There are several reasons. It could be that your hamster accidently injured itself or is having an allergic reaction. It is important that you treat it immediately.