Does holding your breath increase oxygen in blood which can stop hiccups?

While holding your breath can temporarily elevate carbon dioxide levels in the blood, it does not significantly increase the amount of oxygen in the blood. Hiccups are caused by involuntary spasms of the diaphragm, and holding your breath does not directly address this underlying cause. There are various methods and techniques recommended for stopping hiccups, such as drinking water upside down, breathing into a paper bag, or pulling your tongue gently.