Spit-up & reflux

Why so much milk comes back

The valve between the food pipe and the stomach is still floppy in small babies, the stomach is tiny, the diet is all liquid, and babies spend the day lying flat. Milk riding back up is the predictable result. Half of all babies under 3 months spit up daily. The medical label for the harmless kind is a friendly one: “happy spitter”.

• Peak mess is around 2 to 4 months. Most babies outgrow it between 6 and 12 months, once they sit up and start solids.
• The puddle always looks bigger than it is. A tablespoon of milk spreads like a lake. Weight gain, not laundry volume, is the real meter.

What helps (no medicine involved)

• Feed slightly upright rather than flat, and keep feeds calm and unhurried.
• Burp mid-feed and after, over the shoulder or sitting supported on your lap.
• Upright hold for about 20 minutes after feeds, on your chest counts and is the nicest version anyway.
• Do not overfill the tank: smaller, more frequent feeds beat rarer giant ones.
• Loose diaper, no pressure on the belly right after eating.
• Sleep stays flat on the back. No wedges, no propping, no elevated mattress. Reflux is messy; an inclined sleeper is dangerous. The back-sleeping airway handles spit-up fine.

Silent reflux and GERD, briefly

Some babies reflux without much visible spit-up (“silent reflux”): frequent swallowing or gulping after feeds, wet burps, hiccups, crying and arching during or after most feeds. And in a small minority, reflux crosses into GERD: it hurts, feeds are refused, weight stalls. Both are worth a doctor conversation instead of guesswork. Real GERD has real treatments, but most fussy refluxy babies do not need medication, and studies keep showing acid blockers rarely help ordinary infant reflux.