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Men allergic to own sperm get after-sex flu

Men allergic to own sperm get after-sex flu
Imagine if every time you had an orgasm it made you ill for a week. That’s just what happens to men with ‘post orgasmic illness syndrome’, or POIS.

Men with PIOS are allergic to their own semen say Dutch scientists. Within minutes of ejaculating, sufferers start feeling like they’re coming down with flu.

Burning eyes, running noses

When men with POIS have an orgasm they start feeling dreadful, with a fever, headache, runny nose and burning eyes.

Up to now people thought it must be all in the mind. And many sufferers don’t go to the doctor about it, because they’re too embarrassed and confused about what’s happening.


Professor Marcel Waldinger, a sexual medicine expert at Utrecht University, first wrote about the after-sex flu back in 2002. Since then his team has studied a group of 45 Dutch sufferers to work out what was causing the problem. They discovered it was down to sperm allergy.

What’s more, the Utrecht scientists found a way to treat it – by injecting the men with a little of their own semen. They gradually increased the dose until the men became less sensitive to it. The snag is that this way of treating an allergy can take years to work.

Meanwhile, Dr Waldinger continues his work on the fringes of sex science – ‘Foot orgasm syndrome: a case report in a woman’ is one of his more recent research papers.

Have you heard of any seemingly strange sex-related syndromes? Leave a comment below or join the discussion on Facebook.