Not Tonight, Honey... I'm Allergic to Your Spunk
Briefly

Semen allergies, particularly seminal plasma hypersensitivity (SPH), can cause reactions in women from sexual contact. Symptoms include vulvar itching, painful burning, and even anaphylaxis, often confused with other health issues. Safe measures include condom use and desensitization therapy. Historically underrecognized, a study found that nearly 12 percent of postcoital illnesses were related to SPH. An informal survey also reflected similar findings 15 years later, indicating that many cases go misdiagnosed as infections or other conditions. The condition affects a significant number of individuals who may not realize they have it.
Allergic reactions to seminal fluid can manifest as a nasty response to a partner's ejaculate, or even your own. Symptoms range from vulvar itching to anaphylactic shock.
The most common semen allergy is 'seminal plasma hypersensitivity' in which women react to proteins in seminal plasma, not the sperm itself.
If sex routinely leaves you itchy, sore or unwell - and condoms help - you might be allergic to semen.
About 15 years later, an informal survey found that the probable rate of SPH remained the same, but cases were often misdiagnosed.
Read at Futurism
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