My dog recently broke out in what appeared to be hives. There are small lumps all over her back and sides. Her belly seemed to have a rash too and I had recently washed her bedding so I thought it was an allergic reaction to the detergent. I ran her bedding through the wash again with no detergent at all, I gave her a benadryl and cleaned her belly rash (which was not lumpy, but blotchy) and put some ointment on it. Her belly has cleared up, but she still has the little lumps all over her back. The weird thing is, I've never seen her itch at them, so now I'm wondering if it's unrelated and not allergies at all? What could cause little bumps like that to pop up suddenly and stick around for 4 days now?
I'm going to be bringing her into the vet Friday if they don't go away. Not considering it an emergency since they don't seem to affect her at all. But I like to research on my own so I know what I'm dealing with. Any ideas on where I should start?
BTW, my dog is a female pit bull terrier, and probably about 10 years old. She has had small bumps show up due to aging, but only 2 or 3 in random places, not like this, a whole bunch all at once! She's still pretty active for her age and is acting normally. Her food has not changed, and I don't see any fleas on her.
EDIT: Argh, I posted to the wrong dog group. Oops! Mods, feel free to delete.