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Your diaphragm contracts, which forces your lung to draw in air. Hiccups are caused when your body is trying too hard to regulate your breathing, so it accidentally messes itself up. The actual hiccup is your body trying to get back on track.

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12y ago
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12y ago

It is what happens when you diaphragm has a spasm or contracts.

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Q: What happens when you hiccup?
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