Newborn Poop Color Decoder (Save This)
Is this poop color normal, or do I need to call the doctor?
She just had a green poop with stringy mucus in it — is that normal? Most newborn poop colors are completely normal and change a lot in the first week. A few colors, and a few warning signs in your baby, mean you should call your pediatrician. They are easy to spot once you know them.
What is normal, day by day
- Black or very dark green, thick and sticky (this is meconium)
- Hard to wipe off, almost like tar
This is exactly what it should look like at first.
- Lighter, going from dark green to brown to yellow
- Looser and easier to clean as milk comes in
- Green often just reflects the transition off meconium or faster gut transit; it is usually not a problem if baby is feeding well and comfortable
Green transition poop usually means feeding is working.
- Breastfed: yellow, soft, often seedy or mustard-like
- Formula-fed: tan to yellow-brown, a bit firmer
- In the first few weeks, expect at least 3-4 stools a day; markedly fewer can mean baby is not getting enough milk - check with your pediatrician
- Going a day or more between stools is usually only normal AFTER the first month
Yellow and seedy is the classic healthy newborn poop.
Quick color decoder
| Color | What it usually means |
|---|---|
| Black (days 1-2) | Meconium, normal at first |
| Green | Transition stool or fast gut transit, usually fine |
| Yellow, seedy | Normal breastfed poop |
| Tan or brown | Normal formula poop |
| White or chalky, gray | Call the pediatrician |
| Red or bloody | Call the pediatrician |
| Black after day 4 | Call the pediatrician |
Call 911 now if
- Baby stops breathing for longer than about 20 seconds, OR has any breathing pause (even short) with a color change (blue or gray lips, face, or tongue), limpness, or no response, OR turns blue or gray, OR is gasping. Call 911 immediately; if baby is not breathing or not responding, begin infant CPR now and the 911 dispatcher will talk you through it.
- Forceful (projectile) vomiting, or vomit that is green or yellow-green (bile-stained), or vomit with blood or that looks like coffee grounds - go now, especially if baby also is not pooping (this can signal a bowel obstruction).
- Rectal temperature of 100.4 F (38 C) or higher in a baby under 3 months - call your pediatrician now, and if you cannot reach them go to the ER.
- Low body temperature (rectal under about 97.7 F / 36.4 C), or baby is cold, mottled, or hard to warm - this can be a sign of serious infection in a newborn.
- High-pitched cry with arching, stiffness, or limpness - go to the ER.
Call your pediatrician right away if
- White, chalky, gray, or pale clay-colored poop (can signal a liver problem and needs same-day attention)
- Red blood in the poop, or poop that looks black and tarry after day 4
- No poop at all in the first 24-48 hours of life
- Baby is unusually sleepy or hard to wake, limp, refusing feeds, or has a swollen or hard belly
- Watery, frequent stools with signs of dehydration: fewer than about 6 wet diapers a day after day 5, dark or strong-smelling urine, dry mouth, sunken soft spot, and unusual sleepiness
- Yellow skin or eyes in the first 24 hours of life (same-day call - never normal that early), yellow spreading to the belly, arms, legs, palms, or soles, or yellowing with sleepiness, poor feeding, or a high-pitched cry
- Grunting with each breath, nostril flaring, chest or rib retractions, or fast breathing
When color is fine but you still want to check in
- Baby is feeding regularly and has steady wet diapers
- Baby is alert at times and calms with comfort
- You are not sure and just want reassurance, calling is always okay
- Save a photo of any diaper that worries you to show the doctor
Once you have ruled out the warning signs above, take a breath: poop color shifts a lot in these early weeks, and most changes are just your baby adjusting. When something looks off, a quick call to your pediatrician is the right move.
Quick answers
- My baby's poop is bright green. Should I worry?
- Green poop is very common in newborns and usually not a problem. Green often just reflects the transition off meconium or faster gut transit. If your baby is feeding well and seems comfortable, green is generally fine, but mention it at your next visit if it persists.
- How often should a newborn poop?
- In the first few weeks, expect at least 3-4 stools a day; markedly fewer can mean baby is not getting enough milk, so check with your pediatrician. Going a day or more between stools is usually only normal after the first month. What matters most is that your baby is feeding well, has steady wet diapers, and the poop stays soft.
- I saw a tiny streak of red. Is it always blood?
- Not always. Small red streaks can sometimes come from a tiny crack near the bottom or from swallowed blood during breastfeeding. Still, any red in the poop is worth a call to your pediatrician so they can check what is causing it.
Sources & further reading
Log every feed, diaper, and nap — and see the pattern.
ParentFlow keeps your newborn's day in one calm place, so you can stop guessing.
App Store Google Play Open Web AppThis guide reflects current AAP and CDC guidance and is for educational purposes only. It does not constitute medical advice. ParentFlow is a wellness companion — not a substitute for your pediatrician. For any medical concern, contact your healthcare provider.