[Nancy's Hamsters]

Cushings usually doesn't occur on a young hamster. It could be internal mites(the kind that live under the skin and need a vet to do a skin scraping to look for mites under a microscope. Early stage Demodex mange mites don't cause much itching so no scratching.

What size is her igloo as if it is the medium size(mostly recommended for Syrians at stores) that may be where she is rubbing as for a Syrian it really should be the Large Guinea Pig size to avoid a tight squeeze through the door opening.