There is a popular belief that scaring a hiccuping person would cure the hiccups.
Is it true?
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According to the NYU Medical Center's Department of Otolaryngology, there are a variety of methods that have successfully resulted in a cessation of hicupping including;
In a case report published in 2000 entitled "Sexual intercourse as potential treatment for intractable hiccups" Drs Aya Peleg and Roni Peleg discuss a 40-year-old man who was suddenly cured of a four-day case of the hiccups when he ejaculated during intercourse with his wife.
The authors speculated the unexpected cure worked for the same reason as the scare method: "A mechanism similar to this occurs when someone is startled, resulting theoretically in sympathetic stimulation that might lead to a cessation of hiccups,"
I'd also like to add on a personal note that over the years I have repeatedly scared students out of hiccups by making loud noises behind them. While I'm aware the the plural of anecdote isn't data, I can assure you that it does work.