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.
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By Age
What to expect by age
0-5 days
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.
1 week - 6 months
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.
6-12 months
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.
12-36 months
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
Trust your instincts. If something feels wrong, reach out to your pediatrician.
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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.
Tummy Massage for Baby Gas
Gentle abdominal massage can help relieve gas and discomfort in babies by encouraging gas to move through the intestines. The technique involves gentle clockwise circular motions on the belly (following the direction of the digestive tract), the "I Love U" stroke pattern, and gentle knee-to-tummy movements. Massage also provides comforting touch that can soothe a fussy baby.
Silent Reflux in Baby
Silent reflux occurs when stomach acid rises into the esophagus and throat but is swallowed back down rather than spit up. Babies with silent reflux may be fussy during or after feeds, arch their back, have hoarse crying, or refuse to eat, but without visible spitting up. It can be harder to diagnose than typical reflux because there is no obvious spit-up.
Bicycle Legs Technique for Gas
Bicycle legs is a simple, effective technique for helping babies pass trapped gas. Gently moving your baby's legs in a cycling motion pushes against the abdomen and helps gas move through the intestines. Combined with gentle belly massage and tummy time, it is one of the best non-medical approaches to gas relief in infants.
Dark Blood in Baby's Stool
Dark or black blood in stool (melena) is different from bright red blood and may indicate bleeding from the upper digestive tract (stomach or upper intestine). In newborns, black stools in the first few days (meconium) are normal. Beyond the first week, dark, tarry, or coffee-ground-like material in stool needs prompt medical evaluation. Some dark-colored foods and iron supplements can also darken stools without being blood.