The Mystery: the only time I have ever come down with a case of the hiccups, is when I eat hot cornbread. It doesn't happen every time, but if I do get hiccups, it's during or after eating hot cornbread. Never any other kind of food or drink. Why?
The Mystery Solved: (from kidshealth.org)
""Hic!" You've just hiccuped for what seems like the tenth time since you finished your big dinner. Wonder where these funny noises are coming from? The part to blame is your diaphragm (say: die-uh-fram). This is a dome-shaped muscle at the bottom of your chest, and all hiccups start here.Okay, so this either means that I'm excited to eat cornbread and I eat it too quickly, thereby irritating my diaphram? Hmm... I'm not buying it. In any event, it's pretty incredible that we are designed in such a way that even the slightest things can cause our bodies to react with a case of goofy hiccups.
The diaphragm almost always works perfectly. When you inhale, it pulls down to help pull air into the lungs. When you exhale, it pushes up to help push air out of the lungs. But sometimes the diaphragm becomes irritated. When this happens, it pulls down in a jerky way, which makes you suck air into your throat suddenly. When the air rushing in hits your voice box, you're left with a big hiccup.
Some things that irritate the diaphragm are eating too quickly or too much, an irritation in the stomach or the throat, or feeling nervous or excited. Almost all cases of the hiccups last only a few minutes. Some cases of the hiccups can last for days or weeks, but this is very unusual, and it's usually a sign of another medical problem."