Quoting amberNewman0213: How projectile? How old is he? My daughter had that and it kept getting more forcefully and she had pyloric stenosis. It's more common in boys though. However my youngest DD does the same if she dose not burp good after ever feeding. Maybe try being sure all burps are out.
Quoting aehanrahan: Too much air taken in during a feeding will cause gassiness and spitting up. The most common cause its overactive letdown and oversupply, followed by tongue and upper lip ties.
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