it's very possible but i'm not convinced it's an allergy.
could you take a close up pic of the bumps? and clear as possible.
if it's only on her belly and legs where there is only a little hair, there are other possibilities. while you are figuring this out, you should wash all her bedding in fragrance free detergent and give her an oatmeal bath.
~ jo and Gotti Boi (aka Thunder Thighs, aka Jughead, aka The Doo Doo Monster, aka Sexual Chocolate, aka Mister Smiley, aka Sofa King)