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Diagnostic dilemma: A woman's nut allergy was triggered after sex

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Summary
Nutrition label

75% Informative

A 20-year-old woman in the UK developed angioedema after having unprotected vaginal sex with her habitual male partner.

She was already allergic to Brazil nuts, a type of tree nut, but it was unclear what triggered her reaction.

Doctors at the hospital suspected that vaginal sex introduced allergy-triggering proteins from Brazil nuts into the woman's body by way of her partner's semen.