Anonymous wrote:OP here. No antibiotics recently. They are better today, the did come back last night. I have had peanut butter for the past 3 days. I've never been allergic to it in my life, but I was doing great today - no hives or itching, and then I just had a peanut butter cookie about an hour ago, and I can tell the hives are back. That would be so strange though - I'm definitely not allergic to peanuts!
You can develop a peanut allergy at any age, and increasingly adults are developing them out of the blue. See an allergist.