Gastroesophageal Reflux & Colic
in Preterm and Newborn Babies
A warm, evidence-based guide for exhausted, worried, amazing parents.
7 min read · Premium Resource
Many NICU and newborn parents whisper the same exhausted words at 3 a.m.
"My baby cries constantly... spits up... seems uncomfortable...
and I don't know what to do."
Reflux and colic are extremely common in newborns, especially premature babies. Although they often improve with time, the symptoms can feel overwhelming.
This guide explains what's normal, what research actually says, and what really helps.
of healthy newborns spit up daily.
starts after 3 hours/day of crying.
most babies improve by this age.
Why Do Babies Have Reflux?
Newborns, especially preemies, have:
- An immature digestive system.
- A loose lower esophageal sphincter (the valve that keeps milk down).
- Short, frequent feeds.
- Lots of time spent lying flat.
All of this makes milk come back up easily. This is called physiologic reflux, and almost all babies have some degree of it.
Most reflux is normal and not dangerous, even if it looks dramatic.
What About Colic?
Colic is defined as:
- Crying for more than 3 hours a day.
- More than 3 days a week.
- In an otherwise healthy baby.
Preemies often have more colicky behavior because their nervous systems are immature, they can get overstimulated easily, and they're adjusting to life outside the NICU.
Colic feels terrible, but it does not mean something is wrong with your baby.
What Studies Show: Why Acid-Suppressing Medications Rarely Help
Parents often wonder about medications like Proton Pump Inhibitors (PPIs) — e.g. omeprazole, lansoprazole, or esomeprazole. Here's what strong scientific studies have shown:
1. PPIs don't improve typical reflux symptoms
Placebo-controlled trials found no difference in crying, fussiness, arching, and spit-ups between babies taking PPIs and babies taking placebo.
These medications only help acid-related GERD, which is rare in infants.
2. PPIs can cause side effects
Infants taking PPIs have higher rates of pneumonia, gastroenteritis, nutrient malabsorption, and possible changes in the gut microbiome.
Because babies naturally have less acid, suppressing it further can increase infection risks.
3. Medications are reserved for severe or clearly diagnosed GERD
Examples include: poor weight gain, blood in vomit, evidence of esophagitis, persistent feeding refusal, apnea/bradycardia truly linked to reflux (rare).
Even then, specialists recommend short trials, reassessment, and stopping if no improvement.
What Really Helps! (Evidence + Practical Tips)
These strategies are safe and can make a real difference.
Smaller, more frequent feeds
Reduces stomach pressure.
Hold baby upright
20 to 30 minutes after feeding.
Slow-flow nipples
If bottle feeding.
Paced bottle feeding
Allows baby to rest.
Burping during feeds
Minimizes swallowed air.
Side-lying feeding
Often used for premature babies.
White noise, swaddling, warm baths
Helps with colicky behavior.
Tummy time (awake & supervised)
Can reduce gassiness and build strength.
What Does Not Work
- Switching multiple formulas repeatedly.
- Thickeners (often not recommended for preemies unless specifically advised).
- Early introduction of solids.
- Overfeeding to "calm them down."
For Parents: Your Feelings Are Real and Valid
Reflux and colic can be absolutely exhausting. Parents often say things like:
- "I'm doing laundry all day."
- "My baby only sleeps when held."
- "I can't tell if something is wrong."
- "Everyone says it gets better, but it doesn't feel like it."
You are NOT alone.
These symptoms do not mean:
- you're doing something wrong,
- your baby is in constant pain,
- or that you're failing.
Sometimes babies cry even when we've tried everything. Sometimes all you can do is hold them, breathe, and wait for their nervous system to mature.
When to Call Your Doctor
Seek medical advice if your baby has:
- Projectile vomiting
- Blood in spit-up or stool
- Poor weight gain
- Refusing feeds
- Fever
- Breathing problems
- Extreme irritability that seems painful
