The search for a reliable hiccup cure is almost as old as humanity itself, and the list of proposed remedies is long and creative. While no single cure works for everyone, many of these methods are thought to work by increasing carbon dioxide levels in the blood or by overstimulating the vagus nerve, which is involved in the hiccup reflex.
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Hiccup vs. Hiccough: The Anatomy, Science, and Spelling of a Universal Reflex The search for a reliable hiccup cure is
Your glottis (the opening between your vocal cords) snaps shut. The search for a reliable hiccup cure is