Hiccups are involuntary contractions of the diaphragm - the muscle that separates your chest from your abdomen and plays an important role in breathing. Each contraction is followed by a sudden closure of your vocal cords, which produces the characteristic hic sound. Hiccups may result from a large meal, alcoholic or carbonated beverages or sudden excitement. For most people, a bout of hiccups usually lasts only a few minutes. In very rare cases, hiccups may persist for months.
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