Frequent spitting up after feeds
Vomiting that happens often
Arching the back during or after feeding
Fussiness or crying during or after feeds
Refusing to eat or feeding poorly
Coughing, gagging, or choking during feeds
Frequent hiccups
Wet burps or sour-smelling spit-up
Poor weight gain
Trouble sleeping after feeds
Irritability when lying flat
Blood in spit-up or stool
Breathing issues, wheezing, or recurrent coughing
Signs of dehydration
Projectile vomiting
Green or yellow vomit
Vomiting that starts suddenly or worsens
Fever with vomiting
Extreme sleepiness or lethargy