A hiccup is an involuntary contraction (myoclonic jerk) of the diaphragm that may repeat several times per minute. In medicine it is known as synchronous diaphragmatic flutter (SDF), or singultus, Latin for the act of catching one's breath while sobbing. The hiccup is an involuntary action involving a reflex arc. Once triggered, the reflex causes a strong contraction of the diaphragm followed about 0.25 seconds later by closure of the vocal cords, which results in the classic hic sound. At the same time, the normal peristalsis of the esophagus is suppressed.
hiccups are caused due to many reasons The most common triggers for short-term hiccups include: Eating too much Drinking carbonated beverages Drinking too much alcohol Sudden temperature changes Excitement or emotional stress