What makes a person hicup?

Answer 1

The part to blame is your diaphragm. This is a dome-shaped muscle at the bottom of your chest, and all hiccups start here.

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.

Answer 2

Hiccups are caused by involuntary contractions of the diaphragm muscle, which is responsible for breathing. These contractions can be triggered by various factors such as eating too quickly, consuming Carbonated Beverages, sudden excitement or stress, or irritation of the diaphragm or the nerves that control it.