(UPI) — Some case reports suggest sexual activity during a migraine or cluster headache may relieve the pain in at least some patients, researchers in Germany say.

Anke Hambach, Stefan Evers, Oliver Summ and Ingo W. Husstedt of the University of Munster in Germany and colleagues performed an observational study among patients of a tertiary headache clinic. A questionnaire was sent to 800 migraine patients and 200 cluster headache patients.

“We asked for experience with sexual activity during a headache attack and its impact on headache intensity,” the researchers wrote in the study. “The survey was strictly and completely anonymous.”

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