From the YummyYucky team, founded by Nancy Nash
Newborn constipation: what it is (and what it isn't)
Here is the single most useful thing to know: once a breastfed baby is past about a month old, constipation is about hard or painful stool, not how many days it has been, and several quiet days followed by a soft, large, pain-free stool can be normal. Before one month, a breastfed baby stooling less than once a day may not be getting enough milk, so call your pediatrician. A formula-fed baby usually goes at least once most days, and three or more days with no stool is worth a call. At any age, stools that are unusually hard, or hard with blood, can mean constipation even if they come every day.
What normal looks like (it varies a lot)
The two feeding styles have different baselines, and both are normal:
- Breastfed babies often stool frequently in the first weeks, sometimes after every feed. After the first month or so, some slow way down and go several days, even a week, between soft stools. Breast milk is efficient; there is simply less left over. One caveat: in the first month, a breastfed baby stooling less than about once a day may not be getting enough milk, so call your pediatrician rather than waiting for the next weight check.
- Formula-fed babies usually go at least once most days, sometimes every other day, with somewhat firmer stools. Firmer is fine. Hard and dry is not.
And straining? Normal. Young babies work hard at this, complete with grunting, crying, and a dramatic red face. If the stool that finally arrives is soft, that is not constipation, it is a coordination phase called infant dyschezia. We wrote a whole page on it: why babies grunt, strain, and turn red when pooping.
Signs of actual constipation
- Stools that are hard, dry, or pellet-like when they come out
- Blood or streaks of blood with the stool
- A baby who is unusually fussy, or spitting up more than usual
- Straining for more than about ten minutes with nothing to show for it
- A firm, distended belly that seems uncomfortable
- A dramatic change from your baby's own usual pattern
What actually helps at this age
The honest answer for a baby who is not on solids: less than the internet suggests, and most of it starts with a call to your pediatrician. Things that are reasonable:
- Call your pediatrician first. True constipation in a young baby is uncommon enough that they will want to hear about it, and occasionally it points at something that deserves a look.
- Ask about juice rather than starting it. For a baby over one month old, a pediatrician may suggest a small daily amount of apple or pear juice specifically for constipation, and prune juice only after 3 months. That is a treatment they prescribe, not a pantry experiment.
- Keep feeds going as normal. Milk is the whole diet and the whole hydration plan. A well-fed baby is a well-hydrated baby.
What to skip
- Water: babies under 6 months do not need water on top of breast milk or formula unless your pediatrician advises it. Extra water fills a tiny stomach with zero calories, and the AAP warns it can lead to a dangerous condition called water intoxication.
- Juice on your own: the AAP recommends no juice before 12 months. The constipation exception above exists, but it runs through your pediatrician.
- Rectal stimulation: pediatric gastroenterologists advise against putting a thermometer or cotton swab into a baby's bottom to trigger a stool, because it may upset a baby and may teach them to wait for the help instead of learning to go. If someone suggests it, ask your pediatrician first.
- Suppositories, mineral oil, or laxatives without a doctor telling you to.
When to call
Call your pediatrician for hard or bloody stools, a firm uncomfortable belly, unusual fussiness or extra spitting up, a breastfed baby under a month old who is stooling less than once a day, a formula-fed baby who has gone three or more days without a stool, or anything that just feels off. Call promptly if low stool output comes with few wet diapers or poor feeding, because that combination is about intake, not constipation: how many wet diapers means enough milk covers that side.
Log the consistency, not just the count
"Is this normal?" is much easier to answer with two weeks of data than with a 2am memory. Logging each diaper in YummyYucky takes one tap, consistency included, so you can see your baby's actual baseline and show your pediatrician a real pattern instead of a vibe. Hard-stool blips stand out immediately when the log around them says soft.
No account needed to start: tap wet, dirty, or both, and the daily count adds itself up.
Log a diaper in ten seconds →Related reading
Once solids start, constipation plays by different rules: baby constipation and solids. Also see grunting and straining without constipation, normal newborn diaper counts, and baby poop colors.
This is general information, not medical advice. For hard or bloody stools, a distended belly, poor feeding, or any concern about your newborn, contact your pediatrician, and in an emergency contact emergency services.
Frequently asked questions
How do I know if my newborn is constipated?
Look at the stool first. Constipation in a young baby means stools that are unusually hard, or hard with blood; straining for more than about ten minutes with nothing to show for it; unusual fussiness; or a firm, uncomfortable belly. A breastfed baby over about a month old who goes a few days between soft stools, or a baby who grunts and turns red and then passes something soft, is usually not constipated. The calendar does matter in two cases: a breastfed baby under a month old who stools less than once a day may not be getting enough milk, and a formula-fed baby who goes three or more days without a stool may be constipated. Call your pediatrician for either one.
How long can a breastfed baby go without pooping?
After the first month or so, some thriving breastfed babies go several days, even a week, between bowel movements, and it is normal as long as the stool is soft when it arrives and the baby is feeding and gaining well. In the first month, though, a breastfed newborn stooling less than about once a day is a reason to call your pediatrician, because early on it can be a sign of not getting enough milk.
Are formula-fed babies more likely to get constipated?
They can be. Formula-fed babies usually stool at least once most days, sometimes every other day, and their stools tend to be a bit firmer than a breastfed baby’s. If the stools turn hard and dry, or your baby seems genuinely uncomfortable, check in with your pediatrician before changing anything about the formula yourself.
Can I give my newborn water or juice for constipation?
Not on your own. The AAP recommends no juice at all before 12 months, and babies under 6 months do not need water on top of breast milk or formula unless your pediatrician advises it. For true constipation, a pediatrician may suggest a small daily amount of apple or pear juice for a baby over one month old, and prune juice only after 3 months, but that is a call for them to make, not a home remedy to start.
My newborn strains and cries but the poop comes out soft. Is that constipation?
Almost certainly not. Straining, grunting, and going red in the face are normal for young babies, who are still learning to coordinate the muscles involved. If the result is soft, it is usually infant dyschezia, a phase that resolves on its own. Constipation is about what comes out, and soft is the reassuring word.
When should I call the doctor about newborn constipation?
Call if the stools are hard, dry, or bloody, if your baby is unusually fussy or spitting up more than usual, if the belly seems firm and tender, if straining goes on for more than about ten minutes with nothing to show for it, if a breastfed baby under a month old is stooling less than once a day, or if a formula-fed baby goes three or more days without a stool. And call promptly for a newborn who is also feeding poorly or making few wet diapers.
Sources
- American Academy of Pediatrics (HealthyChildren.org): How Can I Tell If My Baby Is Constipated?
- American Academy of Pediatrics (HealthyChildren.org): Where We Stand: Fruit Juice for Children
- American Academy of Pediatrics (HealthyChildren.org): Recommended Drinks for Children Age 5 & Younger
- American Academy of Pediatrics (HealthyChildren.org): Constipation (KidsDoc symptom checker)
- American Academy of Pediatrics (HealthyChildren.org): Baby's First Days: Bowel Movements & Urination
- American Academy of Pediatrics (HealthyChildren.org): How to Safely Prepare Baby Formula With Water
- Zeevenhooven, Koppen and Benninga, Pediatric Gastroenterology, Hepatology & Nutrition (2017): The New Rome IV Criteria for Functional Gastrointestinal Disorders in Infants and Toddlers
Track it in YummyYucky
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Start tracking for freeLast updated September 2026. Next review December 2026. How we write these: built from current published guidance from the AAP, CDC, FDA/EPA, NIAID, WHO, and other pediatric and public-health authorities, with sources cited on the page. See our editorial and medical policy for how we research, source, and update these, and how we double-check the food advice.
This is general information, not medical advice, and is not individualized for your baby. Always talk to your pediatrician about your baby's diet, introducing allergens, and any reaction. In an emergency, contact emergency services.
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