What Are Hiccups? Hiccups are an involuntary contraction (spasm) of the diaphragm muscle. Each contraction is followed by a sudden closure of the vocal cords, which creates the familiar “hic” sound. Most hiccups last only a few minutes or a few hours. However, persistent hiccups last longer than 48 hours. When hiccups continue for more … Continue reading Hypnosis For Hiccups