10 months ago
Last edited at 1:37PM on 6/22/2013
Hi, Falcon. Hiccups can occur when a spasm contracts the diaphragm, a large sheet of muscle that separates the chest cavity from the abdominal cavity. This spasm causes an intake of breath that is suddenly stopped by the closure of the vocal cords (glottis). This closure causes the characteristic "hiccup" sound.
What causes hiccups?
A very full stomach can cause bouts of hiccups that go away on their own. A full stomach can be caused by:
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.