Why do you get hiccups

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Last updated: April 8, 2026

Quick Answer: Hiccups are involuntary contractions of the diaphragm muscle, typically triggered by factors like eating too quickly, drinking carbonated beverages, or sudden excitement. Each hiccup involves a quick closure of the vocal cords, producing the characteristic 'hic' sound. Most episodes last only a few minutes, but persistent hiccups lasting over 48 hours affect about 1 in 100,000 people annually and may require medical intervention.

Key Facts

Hiccups involve involuntary diaphragm contractions at a rate of 4-60 per minute
The longest recorded hiccup episode lasted 68 years (1922-1990) in Charles Osborne
Fetuses can hiccup as early as 8 weeks gestation, helping develop breathing muscles
Approximately 4,000 hospitalizations occur annually in the US for persistent hiccups
Carbonated beverages increase hiccup risk by 30% compared to non-carbonated drinks

Overview

Hiccups, medically known as singultus, are sudden, involuntary contractions of the diaphragm muscle followed by rapid closure of the vocal cords, producing the characteristic 'hic' sound. The phenomenon has been documented since ancient times, with Hippocrates describing them in 400 BCE. Throughout history, various cultures developed remedies ranging from holding one's breath to drinking water upside down. In modern medicine, hiccups are classified by duration: acute (lasting minutes to 48 hours), persistent (48 hours to one month), and intractable (over one month). While most cases are benign and self-limiting, persistent hiccups can indicate underlying medical conditions. The Guinness World Record for longest hiccup episode belongs to Charles Osborne, who hiccuped continuously from 1922 to 1990—approximately 430 million hiccups. Research shows hiccups occur in all age groups, with males experiencing persistent episodes three times more frequently than females.

How It Works

The hiccup reflex involves a complex neurological pathway called the hiccup reflex arc. It begins when stimuli like stomach distension, temperature changes, or emotional excitement activate sensory nerves in the diaphragm, esophagus, or stomach. These signals travel via the phrenic and vagus nerves to the brainstem's medulla oblongata, where the 'hiccup center' processes them. The medulla then sends motor signals back through the phrenic nerve to contract the diaphragm suddenly and forcefully. Simultaneously, it signals the laryngeal nerves to close the glottis (vocal cords) approximately 35 milliseconds after diaphragm contraction, creating the distinctive sound. This process typically repeats 4-60 times per minute. Common triggers include eating too quickly (which distends the stomach), consuming carbonated beverages (increasing gastric pressure by 20-30%), alcohol consumption, sudden temperature changes, and emotional stress. The reflex may serve evolutionary purposes, potentially helping fetal mammals clear amniotic fluid or preventing aspiration in infants.

Why It Matters

While most hiccups are harmless, persistent episodes significantly impact quality of life, causing sleep deprivation, weight loss, and social embarrassment. Medically, they can indicate serious conditions like gastroesophageal reflux disease (present in 10% of chronic cases), pneumonia, or brain tumors. Treatment costs for intractable hiccups exceed $100 million annually in the US alone. Understanding hiccup mechanisms has led to effective treatments: physical maneuvers like breath-holding work by increasing blood CO2 levels, while medications like chlorpromazine target dopamine receptors in the brainstem. For severe cases, phrenic nerve blocks or pacemakers can provide relief. Research continues into hiccups' potential protective functions, particularly in fetal development where they may help coordinate breathing muscles.