It sounds a lot like an allergic reaction to something. Especially since the bumps seem to have gone away after the Benadryl. Was she treated by your own vet for this before?It could be an allergic reaction to food, her bedding, any number of things. I think the best thing you can do is to take her to your vet for a full check up. I'm so glad Aries is feeling better today. But don't wait to get her checked! Give her a hug, OK?