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Could You Be Allergic to Sex?
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Could You Be Allergic to Sex?

For two years, a 26-year-old woman suffered burning and swelling in and near her vagina for 15 minutes after making love.

But she and her husband were puzzled because the symptoms went away if they used a condom. She finally went to her doctor, and what she learned there was startling. Most family physicians and gynecologists are unaware of her mysterious condition.

She is allergic to sex.

How Can This Be?

Medical researchers have found that some women are allergic to their male partner's seminal fluid, the thick liquid that carries sperm. Doctors know the disorder as "human seminal plasma hypersensitivity." In rare cases, the allergic response can cause death.

But there is good news. The condition can usually be treated by allergists although it takes some effort by concerned, caring male partners. But more about the men's' role later.

What Are the Symptoms?

For many women, a sexual allergy is as serious as a heart attack. Most sufferers complain of symptoms that include wheezing, itching and hives all over, chest tightness, vomiting, or diarrhea. Severe reactions include loss of consciousness or complete circulatory collapse. Other women seek medical help complaining of localized reactions such as vaginal burning or swelling. Some women even report blisters in and near their genitalia.

Left untreated, the malady is a sure marriage and relationship wrecker. It's also a source of complete frustration for the couple who wants to have children but must always use a condom.

An afflicted women could also conceivably die if anaphylactic shock caused her air pathways to swell up and block completely.

"A primary candidate for a diagnosis of sexual allergy is a woman who has burning, itching, or swelling in or near her vagina after sexual intimacy has started, and also has some food allergies," says Dr. David Bernstein at the University of Cincinnati College of Medicine. "The dead-bang give away to seminal fluid hypersensitivity is when she has zero symptoms after sex with a condom."

In some cases, afflicted women report the start of pesky post-coital symptoms after their very first sexual experience.

"The condition is so new that it's very possible a family practitioner or even a gynecologist would not be familiar with it," says David Bernstein. "It's also very likely the conditioned is under-reported by both patients and physicians."

In another case, a 30-year-old women went to her doctor because she was having painful burning and tingling in and around her vagina immediately after intercourse. The symptoms then lasted for about six hours. Moreover, several love-making sessions caused her face to swell. But, again, the woman told her doctor there were no symptoms at all when her husband used a condom.

Both that patient and the 26-year-old woman saw an allergist. Through a skin reactivity test, they discovered they were indeed allergic to their husband's seminal fluid. Researchers haven't yet identified the troublesome culprit, but they think that certain proteins in the seminal fluid cause the reaction.

How Is a Sex Allergy Treated?

Once the hypersensitivity is diagnosed, partners are called on to do more than just use a condom. Treatment involves injecting the women regularly with their partner's purified seminal proteins.

For the initial diagnostic screening, only a single sample of the male's ejaculate is needed. But then the allergist needs 5 to 7 days worth of ejaculate to have the volume to formulate enough vaccine for regular injections.

One of the couples went through all the trouble of having the puzzling, painful symptoms diagnosed as sexual allergy. They then worked out a treatment plan, only to discover yet another dimension of human seminal plasma hypersensitivity.

Says Dr. Jonathan Bernstein at the University of Cincinnati College of Medicine, "When we start giving the woman injections, and she and her partner stop having sex, she can lose her tolerance to his seminal plasma." In other words, couples must continue to have regular intercourse or the bothersome symptoms will return.

This created some logistic difficulties for the 26-year-old woman. Her husband was an airline pilot who was out of town frequently, so she was at a loss as to how they would continue their "treatments."

Dr. Jonathan Bernstein to the rescue. "We tell our patients that if they must be apart for some weeks, the male can leave several samples of ejaculate and the woman can then inject a small amount into the vagina. That will keeps the woman's tolerance up."

In this case, a man's work is never done.

RESOURCES:

American Academy of Allergy, Asthma, and Immunology
http://www.aaaai.org

American College of Obstetrics and Gynecologists
www.acog.org

CANADIAN RESOURCES:

Allergy Asthma Information Association
http://aaia.ca/

The Society of Obstetricians and Gynaecologists of Canada
http://sogc.medical.org/

References:

Bernstein J, Herd ZA, Bernstein D, Dorbee SI, Bernstein IL. Evaluation and treatment of localized vaginal immunoglobulin e-mediated hypersensitivity to human seminal plasma. Obstet Gynecol. 1993;82:667-73.

Bernstein J, Sugumaran R, Bernstein D, Bernstein IL. Prevalence of human seminal plasma hypersensitivity among symptomatic women. Ann Allergy Asthma Immunol. 1997;78:54-8.



Last reviewed May 2008 by Ganson Purcell Jr., MD, FACOG, FACPE

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.


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