[LunaTheHamster1]

The reason I asked was that I was wondering if it was dusty or if she is allergic to it. Did it start after a clean cage? Was it a new bag of bedding? Do you notice if it gets worse when she has been burrowing. You could try a different bedding.

Is there a reason why you change the bedding once a week? Just asking because did you know its considered better practice not to change hamsters bedding that often so its less stressful for them. Also, are you replacing the whole bedding as partial cleans are also considered better practice too, it leaves their scent behind. Sorry if I am stating things you already know.

If you think your hamster is getting worse or worried about it and her breathing etc then you could take her to the vets to get her checked over.