Hiccups occur due to spasms of the phrenic nerve, which controls the diaphragm. These spasms can cause discomfort in the gut, abdomen, or chest, and they often interrupt conversations or relaxation. To alleviate hiccups, recommends a breathing technique that involves three sequential deep inhales through the nose, followed by a breath-hold for 15 to 20 seconds before exhaling slowly. This method hyperexcites and then over-relaxes the phrenic nerve, effectively stopping the spasms and thereby eliminating hiccups. It is noted to be an efficient and science-supported way to stop hiccups 1.

Hiccup Cure

Andrew explains that there is a science-supported method to eliminate hiccups. The technique involves taking three big inhales through the nose and holding your breath for 15-20 seconds before exhaling. This method hyperexcites the phrenic nerve three times in a row, which subsequently relaxes or alleviates the spasming of the French nerve.

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How to Breathe Correctly for Optimal Health, Mood, Learning & Performance | Huberman Lab Podcast