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What Causes Hiccups in Newborns?

Published in Newborn Health 3 mins read

Newborn hiccups are a common and usually harmless occurrence, often stemming from specific triggers related to feeding and their developing digestive system.

Hiccups in newborns are primarily caused by a spasm of the diaphragm, the muscle that separates the chest from the abdomen. This spasm occurs when the diaphragm is irritated or stimulated, often due to factors such as a full stomach or ingested air.

Common Causes of Newborn Hiccups

Based on expert insights, several key factors contribute to hiccups in newborns:

  • Rapid or Overfeeding: When a baby feeds a little too fast or a little too much, their stomach can become very full. This distended belly gets full and starts to touch the diaphragm and cause those spasms, leading to hiccups.
  • Ingesting Air: Babies can ingest air while taking a bottle or breastfeeding. This trapped air can cause the stomach to expand, putting pressure on the diaphragm and triggering spasms.
  • Gastroesophageal Reflux (GER): Sometimes, there's a little reflux involved. Reflux occurs when stomach contents, including acid, come back up into the esophagus. This irritation can also lead to diaphragm spasms and, consequently, hiccups.

Understanding the Mechanism

The diaphragm plays a crucial role in breathing. When it contracts suddenly and involuntarily, and the vocal cords close, it produces the characteristic "hic" sound. In newborns, their immature digestive and nervous systems are more susceptible to these irritations, making hiccups a frequent event.

Practical Tips to Help Prevent or Alleviate Newborn Hiccups

While hiccups are generally not a cause for concern, some strategies can help reduce their frequency or shorten their duration:

  • Slower, Smaller Feeds:
    • If bottle-feeding, use a slow-flow nipple to control the pace of milk intake.
    • Offer smaller, more frequent feeds instead of large, infrequent ones.
  • Proper Latch and Positioning:
    • Ensure a good latch during breastfeeding to minimize air intake.
    • Keep the baby in an upright position during and immediately after feeding to aid digestion and prevent air from getting trapped.
  • Frequent Burping:
    • Burp your baby during and after feedings to release any swallowed air. This helps prevent stomach distension that can press on the diaphragm.
    • If hiccups start during a feed, try burping the baby before continuing.
  • Comfort and Distraction:
    • Sometimes, simply comforting the baby or offering a pacifier can help calm the diaphragm and stop the hiccups.
    • A small amount of warm water (if the baby is old enough and pediatrician approved) might help, but feeding more milk is generally advised against if overfeeding is the cause.

Summary of Causes

Cause Explanation Impact on Diaphragm
Rapid/Overfeeding Baby eats too much or too quickly, filling the stomach excessively. Full belly presses against the diaphragm, causing spasms.
Ingesting Air Air swallowed during bottle or breastfeeding expands the stomach. Trapped air puts pressure on the diaphragm.
Gastroesophageal Reflux (GER) Stomach contents irritate the esophagus and potentially the diaphragm. Irritation triggers involuntary diaphragm contractions.

Remember, newborn hiccups are usually harmless and resolve on their own. If hiccups are persistent, interfere with feeding, or are accompanied by other concerning symptoms like excessive spitting up or discomfort, it's always best to consult with a pediatrician.