Why do I get hives after seeing my boyfriend?

last spring/summer/ early fall I started getting hives the morning after seeing my boyfriend. once late fall and winter hit, it stopped. he's always used the same products. now it;s spring again and I saw him last night, woke up this morning with hives again! wtf?! do men put off different hormones or something in the spring? I don't get it!
Why do I get hives after seeing my boyfriend?
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