A 3-month-old who is vomiting milk and crying should be assessed by a pediatric clinician today, especially if vomiting is repeated or worsening. Saliva bubbles alone can be normal at this age, but they do not explain significant vomiting or distress.

Go to the emergency department now if any of these are present:

Green/yellow vomit can indicate bowel obstruction and is an emergency. Royal Children's Hospital vomiting guidance and Sydney Children's bilious-vomiting advice advise urgent emergency assessment.

If it is only a small amount of milk dribbling out after feeds and baby otherwise looks well, it may be reflux/spit-up. Keep baby upright for 20-30 minutes after feeds, offer smaller/more frequent feeds, and burp during and after feeds. Do not prop the baby to sleep or place them on the stomach: always put them flat on their back to sleep.

Because your baby is crying with vomiting, please contact your pediatrician/urgent care now for same-day guidance. If vomiting is projectile or repeated, do not wait, as infants this age can occasionally have conditions such as pyloric stenosis that require examination and ultrasound.