BookmarkBookmarkTick

Q&A: My Baby Has Green Poop, Now What?

What can cause an exclusively breastfed baby to have green poop?
ByJeanne Cygnus, IBCLC, RLC
Lactation Specialist
Updated
March 2, 2017
Hero Image

First, let’s just point out that green poop isn’t a cause for concern as long as your baby is content, eating well, growing well, and there isn’t blood in her stool. Still, you’re right that any poop changes do happen for a reason. (You might not always find the reason, but there has to be one.)

Green, frothy stools can be a result of baby receiving more foremilk than hindmilk. (The first milk that comes out of your breast is lower in fat and higher in lactose than the milk at the end.) This increase in lactose moves through baby’s system very quickly and can result in green poop. Sometimes this happens when mom has an especially forceful letdown, or has an oversupply of milk. If baby is otherwise, healthy, happy, and gaining weight, nothing needs to be done. If baby is having trouble eating or isn’t gaining properly, a lactation specialist can help you find a solution (like expressing a little milk before baby latches on, or feeding a few times from the same side to decrease your milk supply).

Green watery stools with a foul odor can be a sign of diarrhea, especially if it’s super-frequent. Baby diarrhea can be caused by a virus, infection, stress or a food intolerance.

Green mucousy stool is a sign that baby’s intestines are irritated. If this lasts a few days and then starts getting better, it’s probably a virus or a mild reaction to something in mom’s diet. Teething can also be the culprit: When baby swallows a ton of drool, it can irritate the intestines and cause some mucus in the poop.

Related Video

What Is Rotavirus?

profile picture of The Bump Editors
The Bump Editors

Is My Baby Constipated?

profile picture of Jack Newman, MD, FRCPC
Jack Newman, MD, FRCPC
Pediatrician

How Can I Fix Baby's Constipation?

profile picture of Excerpted from You Raising Your Child by Mehmet C. Oz, MD, and Michael F. Roizen, MD
Excerpted from You Raising Your Child by Mehmet C. Oz, MD, and Michael F. Roizen, MD

How Will I Know if Baby Has Diarrhea?

profile picture of Jack Newman, MD, FRCPC
Jack Newman, MD, FRCPC
Pediatrician

Diarrhea in Babies

profile picture of Paul Horowitz, MD
Paul Horowitz, MD
Pediatrician
box of dyper compostable baby diapers

DYPER Launches First-Ever National Diaper Composting Service

profile picture of Nehal Aggarwal
Nehal Aggarwal
Associate Editor
Published
02/19/2020
little girl sliding down slide at playground

Mom’s Tale of Cleaning Poop Off a Slide Has the Internet Cracking Up

profile picture of Laurie Ulster
Laurie Ulster
Contributing Writer
Published
10/03/2019
cryptosporidiosis outbreak in public pools

CDC: Parasitic Infection in Pools That Causes Diarrhea Is on the Rise

profile picture of Stephanie Grassullo
Stephanie Grassullo
Associate Editor
Published
07/01/2019
mom changing baby's diaper

The Makeup of Baby Poop Is Changing—And That Might Not Be a Good Thing

profile picture of Anisa Arsenault
Anisa Arsenault
Associate Editor
Published
03/09/2018

What Should Formula Poop Look Like?

profile picture of -- Sabrina Braham, MD, pediatrician in Menlo Park, California and adjunct clinical faculty member at Stanford University
-- Sabrina Braham, MD, pediatrician in Menlo Park, California and adjunct clinical faculty member at Stanford University
Pediatrician

Q&A: How Much Pooping Is Normal?

profile picture of Jeanne Cygnus, IBCLC, RLC
Jeanne Cygnus, IBCLC, RLC
Lactation Specialist
Article removed.