Why Do We Hiccup?

Hiccups are caused by involuntary contractions of your diaphragm — the muscle that separates your chest from your abdomen and plays an important role in breathing. This involuntary contraction causes your vocal cords to close very briefly, which produces the characteristic sound of a hiccup.

What is the purpose of a hiccup?

As they breathe out, the diaphragm pushes up to expel the air. When a person has hiccups, the diaphragm contracts and pulls down, drawing in air between breaths. Immediately after this, the windpipe closes for a moment to prevent more air from entering the lungs.

Is hiccup good or bad?

Hiccups, or hiccoughs, are involuntary sounds made by spasms of the diaphragm. Hiccups are usually harmless and resolve by themselves after a few minutes. In some cases, prolonged hiccups that last for days or weeks may be symptomatic of underlying disorders.