Baby Black Poop
The short answer
Black poop in a newborn's first few days (meconium) is completely normal and expected. Black or very dark green stools can also be caused by iron supplements or iron-fortified formula. However, black tarry stools outside of the newborn period that are not explained by iron can indicate digested blood from higher in the digestive tract and should be evaluated by a doctor promptly.
By Age
What to expect by age
Meconium is the first stool your baby passes, and it is normally dark greenish-black, thick, sticky, and tar-like. This is made up of material your baby ingested in the womb, including amniotic fluid, mucus, and bile. Meconium should transition to lighter green and then yellow stools within the first 3-5 days. This transition is a sign that feeding is going well.
After the meconium period, truly black stools are not normal unless your baby is taking iron supplements, which commonly turn stools dark green to black. If your baby has black tarry stools and is not on iron, this could indicate upper gastrointestinal bleeding (where blood is digested as it passes through the intestines) and needs medical evaluation right away.
Iron-fortified cereals and iron supplements started around this age are the most common cause of dark or black stools in this age range. Some foods like blueberries, blackberries, and foods with dark food coloring can also darken stools. If iron intake explains the color, there is no concern. Unexplained black tarry stools always warrant a call to your doctor.
Black stools in toddlers are most commonly caused by foods (blueberries, blackberries, dark chocolate, black licorice, grape juice) or iron-containing vitamins. Bismuth-containing products like Pepto-Bismol (not recommended for children but sometimes given inadvertently) can also cause black stools. Unexplained black tarry stools need medical evaluation.
What Should You Do?
When to take action
- Your newborn is passing dark black-green meconium in the first 2-3 days of life
- Your baby is taking iron drops or iron-fortified formula and stools are dark green to black
- Your baby ate blueberries, blackberries, or foods with dark coloring and has a dark stool
- The dark stool is temporary and your baby is otherwise well with no symptoms
- You are unsure whether your baby's dark stools are from iron supplements or another cause
- Meconium-like stools persist beyond the first 5 days of life without transitioning to yellow or green
- Your baby has very dark stools along with increased fussiness or decreased feeding
- Your baby has black, tarry, sticky stools (like tar or coffee grounds) that are not explained by iron supplements or meconium, as this can indicate bleeding in the upper digestive tract
- Black stools are accompanied by vomiting (especially vomit that looks like coffee grounds), lethargy, or pallor
- Your baby appears unwell with black stools, including signs of pain, poor feeding, or unusual drowsiness
Sources
Related Resources
Related Digestive Concerns
My Baby's Belly Looks Swollen
A rounded, slightly protruding belly is completely normal in babies and toddlers due to immature abdominal muscles and their proportionally larger organs. However, if the belly becomes suddenly swollen, feels hard and tight, or is accompanied by pain, vomiting, or changes in bowel movements, it needs medical evaluation as it could signal gas buildup, constipation, or rarely, something more serious.
My Baby Has an Anal Fissure (Blood When Pooping)
A small streak of bright red blood on the surface of your baby's stool or on the diaper is most commonly caused by an anal fissure, which is a tiny tear in the skin around the anus from passing hard stool. Anal fissures are very common in babies and toddlers and usually heal on their own with simple measures like keeping stools soft. While this is rarely serious, any blood in your baby's stool should be mentioned to your pediatrician.
My Baby Eats Non-Food Items (Pica)
It is completely normal for babies and young toddlers to explore by putting objects in their mouths. True pica, which is the persistent eating of non-food substances, is uncommon before age two and may be linked to iron deficiency or developmental factors. If your child repeatedly seeks out and eats non-food items past the typical mouthing stage, it is worth discussing with your pediatrician.
Baby Excessive Gas After Starting Solids
Increased gas after starting solid foods is completely normal and expected. Your baby's digestive system is encountering new proteins, fibers, and sugars for the first time and needs time to adapt. The gut bacteria are also diversifying, which naturally produces more gas. This typically improves within a few weeks as the digestive system adjusts to each new food.
My Baby Gulps Air While Feeding
Swallowing some air during feeding is normal for all babies, but excessive air gulping can lead to gas, hiccups, and spit-up. Common causes include fast milk flow, poor latch (if breastfeeding), bottle nipple flow that's too fast or slow, and crying before feeds. Simple adjustments to feeding position, pacing, and equipment can usually help reduce air intake significantly.
Baby Poop Color Changes with Solids
Dramatic changes in poop color after starting solids are completely normal and expected. What your baby eats directly affects stool color - carrots may turn poop orange, spinach makes it green, beets can make it reddish, and blueberries can turn it dark blue-black. As long as your baby is comfortable and the stool is not white, black (tarry), or bright red with blood, these color changes are harmless.