Why is My Newborn Vomiting?

Why is My Newborn Vomiting?

You’ve finally mastered the latch, and now you believe you’re on your way to baby-feeding success just to be deterred by a whole lot of baby spit up. Like, an entire feeding projected all over your favorite sweats, the couch, your baby’s third outfit of the day, and anything else within a 3-foot radius. No amount of burp cloths can help this situation that keeps occurring, and you’re really starting to worry that Baby may have an underlying issue and/or isn’t getting enough nutrients. Sound familiar? Well don’t worry, you’re not the first mom to go through newborn vomit sessions, and you’re certainly not the only one wondering what in the world is going on!

Copper Pearl 3 Pack Burp Cloth Set - Rosie
Copper Pearl 3 Pack Burp Cloth Set - Rosie

So what could it be? Is it acid reflux? An allergy, maybe? Are you feeding your baby too much at one time? Or is this abnormal-seeming reoccurrence perfectly normal? Let's dive into a few of these possibilities, but be prepared for a lot of trial-and-error type recommendations, because not every condition is the same and babies wont always respond immediately to some changes, so patience is key in figuring this out!

Acid Reflux

Reflux in babies is very common due to an underdeveloped digestive system, particularly the lower esophageal sphincter. Because this muscle is weak or underdeveloped in many newborns, acid and contents of the stomach will creep back up causing a lot of discomfort for babies. Spitting up and vomiting are not the only signs of this, you can also expect to see many other symptoms. If you suspect it is indeed reflux, you’ll definitely want to talk about it with your child’s pediatrician. Meanwhile, keeping your baby propped up for a time after each feeding, and shortening feedings so his/her tummy doesn’t get so full at one time are good places to start! Luna Lullaby Bosom Baby Nursing Pillow
Luna Lullaby Bosom Baby Nursing Pillow


It is very unlikely for your baby to be allergic to your breast milk, but they could be allergic or unable to tolerate something you may be eating. In many cases, cow’s milk or dairy products are the culprit and once they are reduced or cut out of your diet, you may see some vast improvements in your baby’s eating habits and overall mood. If it’s not dairy products you suspect, keep a log of foods you eat and how your baby responds to them; typically 3-5 hours after you eat it’ll be in your milk supply. Usually all it takes is cutting a menu item or two out of your diet for a few months for the allergy-like symptoms to subside.

As for formula: if your baby is allergic to formula, it may very well mean they are allergic to cow’s milk, but it doesn’t guarantee this fact. Vomiting will not be the only sign of allergies, you will also likely see rashes, hives, diarrhea, and likely more symptoms. You’ll for sure want to bring up these concerns to the pediatrician!


Your infant may have a combination of a few of these symptoms, which isn’t unlikely. A lot of breastfeeding newborns are picky about what Mom eats, which is understandable because of their fragile digestive systems. So eating zero or small amounts of dairy or avoiding gassy foods like broccoli or spicy foods may help your baby out immensely. A baby’s stomach is really quite small! Loading it completely full may very well be the cause of a lot of vomit-– whether severe reflux is involved or not. Try switching to smaller, more frequent meals and see if you notice a difference! This may mean only feeding from one breast at a time or dropping an oz or two from bottle feedings. Comotomo Natural Feel Baby Bottle Double Pack 5 oz
Comotomo Natural Feel Baby Bottle Double Pack 5 oz

Of course, there’s always the option that the vomiting may mean nothing at all, which sounds ridiculous, but is a possibility. Babies spit up when they have bubbles in their stomach, so there could’ve been a few vomit-inducing bubbles and they may get through it just fine, or there could be more to the story. The pediatrician will likely tell you that to doctors, there isn’t a medical difference between a baby spitting up and a baby vomiting. This may come as a surprise to you, but it is a testament to how common baby vomiting really is. Being able to give your pediatrician as many facts and details as possible will be a good start in deciding whether there is an underlying issue involved. But he/she very well may tell you to try out a few different things before some tests or medications are given.

It’s a lot of work, worry, stress, and mess dealing with a baby who frequently vomits. Try a few of these tricks, read up on some more suggestions, keep your pediatrician in the loop, follow your pediatrician’s advice, and use your mom-intuition. Keeping an eye on your baby’s weight and overall demeanor is a good idea here too! But this scary and frustrating phase will likely pass quickly if the proper care is put in place, so be patient and keep doing the best that you can!

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