https://www.healthline.com/health/how-to-get-rid-of-hiccups#food-and-drinks
Unusual but proven studies
You might not be familiar with these methods, but both are backed by scientific case studies.
22. Have an orgasm. There’s a case study involving a man whose hiccups lasted for four days. They immediately went away after he had an orgasm.
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. Perform a rectal massage. Another case study reports that a man with ongoing hiccups found immediate relief after a rectal massage. Using a rubber glove and plenty of lubricant, insert a finger into the rectum and massage.
Other remedies
Here are a few other enduring remedies you can try.
24. Tap or rub the back of your neck. Rubbing the skin at the back of your neck may stimulate your phrenic nerve.