Why Hiccups Happen

Hiccups are involuntary contractions (spasms) of the diaphragm — the large muscle under your lungs. Each contraction causes a sudden intake of breath that is cut off when your vocal cords snap shut, producing the "hic" sound. Common triggers: eating too fast, swallowing air, sudden temperature changes in the stomach, or excitement.

Methods That Actually Work

  1. 1

    Hold your breath (most reliable)

    Take a deep breath and hold it for as long as comfortable — at least 10–20 seconds. The buildup of CO2 in the blood relaxes the diaphragm and resets the breathing rhythm. Exhale slowly. Repeat if needed.

  2. 2

    Breathe into a paper bag

    Breathe in and out of a paper bag (not plastic — plastic can cause suffocation) for 30 seconds. This recirculates exhaled CO2-rich air, raising blood CO2 levels and stopping the diaphragm spasm. Very effective.

  3. 3

    Swallow rapidly 10 times

    Without taking a breath, swallow rapidly 10 times in quick succession. The repeated swallowing action triggers the swallowing reflex which can override the hiccup reflex.

  4. 4

    Drink water — specific techniques

    Slowly drink a full glass of water without stopping. Or drink water while blocking your ears with your fingers. Or drink water bent over (head upside down). The distraction and swallowing rhythm interrupts hiccups in many people.

  5. 5

    Sugar on the tongue

    Place a teaspoon of granulated sugar on the back of your tongue. Let it dissolve. The sweet taste stimulates the vagus nerve which calms diaphragm spasms. A classic remedy with some scientific basis.

Scaring someone does not workDespite the old belief, being startled does not reliably stop hiccups. The CO2 methods (holding breath, paper bag) have the most physiological basis for effectiveness.
See a doctor if hiccups last more than 48 hoursPersistent hiccups (lasting more than 2 days) can indicate an underlying medical condition including acid reflux, medications, or rarely neurological issues. Hiccups lasting more than a month are classified as intractable and require medical investigation.

Frequently Asked Questions

Holding your breath increases CO2 in the blood. Higher blood CO2 inhibits the phrenic nerve signals that trigger diaphragm contractions — the cause of hiccups. The same mechanism explains why breathing into a paper bag works.
Eating too fast, swallowing air, eating very hot or very cold food, carbonated drinks, and overeating are all common triggers. The stomach and diaphragm are adjacent — a full or distended stomach can irritate the diaphragm directly.