Is my new girlfriend allergic to me, I mean in a medical way?

Hi, my new girlfriend has been breaking out with hives after contact with me (kissing, touch). I live in Canada and she is in Oregon, we’ve spent time together on two occasions in the last month. She has reacted within a few days of contact with small round bumps developing on her shoulders, her back, and her bottom lips. I have never experienced anything like this with any other partner. We have no ideas of what could be causing this. Could she be allergic to my saliva? I take no medications, nor do I use any strong soaps or products. Any help would be greatly appreciated. Thank You

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