Poop consistency can tell you a lot of things about your baby’s health. For instance–and this is common–watery poop may mean your baby may have an upset stomach. But a baby’s poop color says a lot more, so pay close attention to what’s on your baby’s diaper. Here are some likely diagnoses.

Greeny Black

Dark green poop is what experts call meconium. Why is it dark-colored? It’s probably due to the amniotic fluid content as well as some secretions of the intestinal glands. It can also have fatty acids, bile pigments, and intrauterine debris. The first feces of newborn infants are called meconium. These are food residues from when the infant was still in the uterus.

Mustard Yellow

This is the poop color of babies exclusively fed with breast milk. It’s normal and it means your baby is healthy. Sometimes, too, the poop may appear somewhat lightly orange.


If it’s something like a soft peanut sauce, your baby is probably on formula milk. If it’s solid (not watery), then the poop is normal. There’s nothing to worry about.

Lime Green

This color means there is an imbalance between foremilk and hindmilk in your baby’s tummy. For some reason, your baby gets more of the lactose found in the initial parts of milk than the creamy fat found in its last parts. This often happens when the baby gulps down too much milk at a time, causing oversupply.

Or, there may be a problem with the baby’s latch or a bug in the stomach. Sometimes, it’s what mom has been eating that is passed on to the baby through breastfeeding that causes the problem. To make sure the problem is addressed accurately, consult your medical doctor or lactation consultant.

Forest Green

This baby’s poop color may be the result of an iron supplement the baby is taking. Or, your baby’s poop may be undergoing a transition from being meconium to being a common fecal matter. In short, the baby’s digestive system is adjusting to growth. [INPOSTLB]


Brown is the poop color when the baby starts eating more solid food and drinking less milk. Gradually, the baby’s poop begins to look like adult poop.


Is there white poop? White, chalk white or a somewhat grayish poop may mean the baby’s digestive system may have a problem. Usually, it’s a liver malfunction and has to do with not secreting enough bile.  Consult your pediatrician right away.


A red poop may be caused by something the baby ate that was colored red. However, if the poop has normal color but comes with red spots or blemishes, it may mean allergy to dairy food. If the baby has constipation (poop is dry and hard), the red streaks are caused by straining during poop. If it’s watery red, it may be an infection. In all the above cases, consult your doctor.

Don’t throw your baby’s soiled diapers right away. Instead, take note of the baby’s poop color to help identify his health condition.