If your baby spits up after nearly every feed, you're not doing anything wrong, and neither is your baby. The NIH's National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) puts a real number on it: about 70 to 85 percent of infants have daily regurgitation by two months of age.
What's normal
Ordinary infant reflux (GER) happens because babies spend most of their time lying down and their esophagus and lower esophageal sphincter aren't fully developed yet — both improve with maturity. The AAP describes a "happy spitter": a baby who brings up milk effortlessly, isn't in distress, and keeps gaining weight normally. It typically starts within the first few weeks, peaks around four to five months, and resolves for most full-term babies by 9 to 12 months, often as they start sitting up and eating solids.
Contact your pediatrician if spit-up is forceful or projectile, contains blood, or looks green or yellow (bile) — the last of these needs emergency evaluation. Other red flags, consistent across the AAP, NIH, and NHS: poor weight gain or weight loss, refusing feeds, crying or back-arching during feeds, breathing problems like wheezing or persistent coughing, choking or trouble swallowing, and reflux that starts before two weeks of age, starts after six months, or is still happening past 12 to 18 months.
Easing typical reflux
The NHS's practical advice: hold your baby upright during and after feeds, burp them regularly, and check your feeding position and technique. One important caveat — never raise the head of the crib or bassinet to manage reflux. Babies should still sleep completely flat on their back, per safe sleep guidelines, regardless of reflux.
Reflux vs. GERD
Gastroesophageal reflux disease (GERD) is a more serious, less common version of reflux — but NIDDK is explicit that there isn't a well-established number for how common it actually is, because it's difficult to diagnose in infants. Rather than a spitting-up problem, GERD tends to show up as poor weight gain, feeding refusal, marked irritability tied to regurgitation, or breathing symptoms. If your baby has those signs, that's a conversation for your pediatrician rather than something to self-diagnose.
Sources
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