Baby Reflux: Symptoms, Causes, and Management

What Is Baby Reflux?

Gastroesophageal reflux (GER) is the backflow of stomach contents into the esophagus. In babies, this is extremely common — the lower esophageal sphincter hasn't matured, and infants are fed an almost entirely liquid diet.

More than 50% of babies spit up regularly in their first 3 months. The vast majority is physiological reflux — normal, requires no treatment.

Normal Reflux vs. GERD

• Physiological reflux (normal): Baby spits up but is gaining weight, calm, and shows no pain signs — the "happy spitter." Usually diminishes by 4–6 months, nearly resolves by 12 months.
• GERD (Gastroesophageal Reflux Disease): Reflux causes distress or harm — poor weight gain, intense crying, food refusal, swallowing difficulties, chronic cough or wheezing. Requires pediatric evaluation.

Symptoms to Watch For

• Frequent spitting up or vomiting after feeds
• Fussiness or crying during or after feeding
• Food refusal or suddenly pulling away from the breast/bottle
• Arching back or extending neck during feeding
• Chronic cough or wheezing
• Slow weight gain (in GERD)

At-Home Management

• Upright after feeds: Keep baby upright on your shoulder for 20–30 minutes after each feeding.
• Smaller, more frequent feeds: Large volumes overwhelm the stomach. Shorten sessions and increase frequency.
• Burp frequently: Take burp breaks during and after each feed.
• Safe sleep position: Always place baby on their back — do not elevate the sleep surface unless a clinician advises it.

When to See a Doctor

• Baby is not gaining weight — see our guide on baby weight loss
• Intense crying at every feeding or consistent food refusal
• Green or bloody vomit
• Fever accompanying the symptoms
• Breathing difficulty or color changes (blue/pale)
• Symptoms worsening after 6 months

Do Babies Need Medication?

PPIs and H2 blockers are used in confirmed GERD — but research shows they don't improve symptoms in physiological reflux and may negatively affect gut microbiome development. Medication should never be started without a clinical evaluation.