A sudden bout of hiccups can be funny at first and irritating soon after, especially when they won’t stop. Hiccups are an involuntary reflex, and while the exact reason we get them isn’t fully understood, the common triggers are well known.
Quick Answer
Hiccups happen when the diaphragm suddenly contracts and the vocal cords snap shut, usually triggered by eating too fast, carbonated drinks, alcohol, or a sudden change in stomach temperature. Most episodes resolve within a few minutes.
Common Causes of Hiccups
Eating or Drinking Too Quickly
Swallowing air along with food or drink can irritate the diaphragm, triggering the reflex that causes hiccups.
Carbonated Drinks
Fizzy drinks introduce extra gas into the stomach, which can stretch it and trigger the diaphragm to spasm.
Alcohol
Alcohol can irritate the oesophagus and affect the nerves controlling the diaphragm, making hiccups more likely, particularly with rapid drinking.
Sudden Temperature Changes
Eating something very hot followed by something cold, or vice versa, can trigger a hiccup reflex in some people.
Overeating
A very full stomach can press against the diaphragm, triggering spasms and hiccups shortly after a large meal.
Stress or Excitement
Strong emotions can affect breathing patterns and nerve activity in ways that occasionally trigger hiccups.
Swallowing Air
Chewing gum, drinking through a straw, or talking while eating can all introduce extra air into the stomach, increasing the likelihood of hiccups.
How to Stop Hiccups
- Hold your breath for 10 to 15 seconds, then exhale slowly
- Drink a glass of water slowly and steadily
- Breathe into a paper bag briefly to increase carbon dioxide levels
- Gently pull on your tongue, which can stimulate the nerve involved in the reflex
- Swallow a small spoonful of sugar or honey
None of these methods work for everyone, but they interrupt the normal breathing pattern enough to reset the diaphragm in many cases.
When Hiccups Need Medical Attention
- Hiccups last longer than 48 hours
- They interfere with eating, sleeping, or breathing
- They come with chest pain, difficulty swallowing, or vomiting
- They keep recurring frequently over weeks with no clear trigger
Persistent hiccups lasting more than 48 hours can occasionally point to an issue affecting the diaphragm or the nerves controlling it, and are worth having assessed.
FAQs
Why do hiccups happen for no reason?
Often there is a mild trigger, such as swallowed air or a temperature change, that isn’t immediately obvious, though occasionally hiccups do seem to start spontaneously.
Is holding your breath the best way to stop hiccups?
It works for many people by increasing carbon dioxide levels and helping reset the diaphragm’s rhythm, though no single method works universally.
Can hiccups be a sign of something serious?
Occasional hiccups are harmless, but hiccups lasting more than 48 hours or interfering with daily activities are worth having checked.
Conclusion
Hiccups are a harmless, involuntary reflex usually triggered by eating habits, carbonated drinks, or sudden temperature changes, and typically resolve within minutes. Hiccups that persist beyond 48 hours or interfere with daily life are worth discussing with a doctor.
Last reviewed: August 2026. This article is for general information only and does not replace professional medical advice. If hiccups last more than 48 hours, please speak to a GP.
