Constipation (0-12 Months)

Is this your child's symptom?

  • Can't pass a stool or pain when passing a stool
  • Crying when passing a stool (bowel movement or BM) or
  • Can't pass a stool after straining or pushing longer than 10 minutes or
  • 3 or more days without passing a stool (exception: breastfed and over 1 month old)
  • Caution: any belly pain from constipation comes and goes. Most often, it is mild. Use the Abdominal Pain (Stomach Pain) care guide if there is constant belly pain.

Causes of Constipation

  • True constipation is uncommon in infants.
  • Sometimes, it is caused by a formula-only diet.
  • Infantile botulism is a rare cause of constipation during the first year.  More common symptoms are the new onset of a weak suck, weak cry and droopy eyelids.
  • Lots of grunting during the first 3 months is often mistaken for constipation. See below.

Grunting to Poop During Early Months – Normal

  • Grunting, straining and pushing to pass a stool is normal during the first 3 months
  • They also become red in the face.
  • They draw up their legs to tighten their tummy muscles.
  • They are fussy but not in any pain. They usually don't cry.
  • Straining even occurs with soft stools.
  • After 5 minutes or so, they usually pass a poop. If not, they most often pass one after the next feeding. Unlike constipation, they pass several soft stools per day. They don't skip days.
  • Doctors call this the grunting baby syndrome.
  • It is normal, not constipation.

Cause of Grunting to Poop

  • Some newborns have to learn how to relax their anus when their rectum is full.
  • Reason: they spent 9 months in the womb with the anus tightly closed.
  • They also have to build up their tummy muscles.
  • This normal process takes longer in some babies than others.
  • About 20% of newborns have the grunting baby syndrome.

When to Call for Constipation (0-12 Months)

When to Call for Constipation (0-12 Months)

Go to ER Now

  • Vomiting bile (green color). Exception: stomach juice which is yellow.

Call Doctor or Seek Care Now

  • Straining goes on more than 1 hour after using care advice
  • Age less than 1 month old and breastfed
  • Age less than 12 months with recent onset of weak suck or weak muscles
  • Your child looks or acts very sick
  • You think your child needs to be seen, and the problem is urgent
  • Vomits 2 or more times and stomach looks more swollen than normal

Contact Doctor Within 24 Hours

  • Age less than 2 months. Exception: normal straining and grunting.
  • Bleeding from anus
  • Suppository was given but did not work
  • You think your child needs to be seen, but the problem is not urgent
  • Child may be "blocked up"

Contact Doctor During Office Hours

  • Suppository was needed to get the stool out
  • Painful stools occur 3 or more times after changes to diet
  • Constipation is a frequent problem
  • Infrequent stools do not get better after changes to diet. Exception: normal if breastfed infant more than 1 month old and stools are not painful.
  • Stool softeners are being used and have not been discussed with your doctor
  • You have other questions or concerns

Self Care at Home

  • Mild constipation in infant

Go to ER Now

  • Vomiting bile (green color). Exception: stomach juice which is yellow.

Call Doctor or Seek Care Now

  • Straining goes on more than 1 hour after using care advice
  • Age less than 1 month old and breastfed
  • Age less than 12 months with recent onset of weak suck or weak muscles
  • Your child looks or acts very sick
  • You think your child needs to be seen, and the problem is urgent
  • Vomits 2 or more times and stomach looks more swollen than normal

Contact Doctor Within 24 Hours

  • Age less than 2 months. Exception: normal straining and grunting.
  • Bleeding from anus
  • Suppository was given but did not work
  • You think your child needs to be seen, but the problem is not urgent
  • Child may be "blocked up"

Contact Doctor During Office Hours

  • Suppository was needed to get the stool out
  • Painful stools occur 3 or more times after changes to diet
  • Constipation is a frequent problem
  • Infrequent stools do not get better after changes to diet. Exception: normal if breastfed infant more than 1 month old and stools are not painful.
  • Stool softeners are being used and have not been discussed with your doctor
  • You have other questions or concerns

Self Care at Home

  • Mild constipation in infant

Care Advice

What You Should Know about Constipation:

  • True constipation is not common in infants.
  • When it occurs, most often, it's from a change in diet.
  • Passing a stool should be free of pain.
  • Any child with pain during stool passage or infrequent stools needs treatment. At the very least, they need changes in their diet.
  • Here is some care advice that should help.

Diet for Constipation in Infants:

  • Age more than 1 month old: only on breast milk or formula, add fruit juice.
  • Amount. Give 1 ounce (30 mL) per month of age per day. Limit amount to 4 ounces (120 mL).
  • Pear and apple juice are good choices. After 3 months, can use prune (plum) juice. Reason for fruit juice: approved for babies in treating a symptom.
  • If on solid (baby) foods, add those high in fiber. Do this twice a day. Examples are peas, beans, apricots, prunes, peaches, pears, or plums.
  • If on finger foods, add cereals and small pieces of fresh fruit.

Exercises to Help Stool Release:

  • Help your baby by holding the knees against the chest. This is like squatting for your baby. This is the natural position for pushing out a stool. It's hard to have a stool lying down.
  • Relax the legs then press up again. Move them like riding a bike.
  • Gently pump on the lower abdomen with your fingers. This may work even better.
  • If no stool release within 5 minutes, stop. It will usually work next time your baby is straining.

Warm Water to Relax the Anus:

  • Warmth can help relax the anus and release a stool.
  • Apply a warm wet washcloth to your baby's bottom. Or help them sit in a basin of warm water. Caution: always stay with them.
  • You can also put a warm wet cotton ball on the anus. Vibrate it side to side for about 10 seconds to help relax the anus.
  • Caution: don't put anything inside the anus to trigger pooping. Reason: It could become habit forming.

What to Expect:

  • Most often, changes in diet helps constipation.

Call Your Doctor If:

  • Constipation lasts more than 1 week after making changes to diet
  • You think your child needs to be seen
  • Your child becomes worse

Copyright 2000-2026 Schmitt Pediatric Guidelines LLC. Date Updated: Feb 01 2026 00:00 Version 0.2

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February 12, 2026
There are cases of measles in NC, and we are aware of exposures in Chapel Hill, Durham, and Wake County. We can give the MMR dose early to families who want it. This applies to infants 6-12 months who have not gotten a dose yet or kids under 4-5 years who have not gotten their second MMR dose. At this time, the NC DHHS and health departments are not recommending this unless traveling or living in an area with sustained transmission. 2 doses of the MMR vaccine are highly effective (97%) at preventing measles infections. At CHCAC, children receive their first dose at 12 months of age and a second dose at 4 years of age, ensuring they are fully protected as soon as possible, in accordance with the most up-to-date AAP recommendations. Some infants aged 6 months to 11 months who travel internationally or in high-prevalence areas may need a dose to protect them; however, they still require the 1-year and 4-year-old doses as well. If you are ever concerned about a possible exposure to measles, please CALL before entering our office. DO NOT ENTER the office. NC DHHS keeps a list of areas with measles exposures here . This is a highly contagious illness, and special precautions must be taken to prevent spread. The virus can be present in the air for 2 hours after an infected person is in the room, and 90% of susceptible patients can be infected. As always, if you have questions, we are here to help make sense of it all!
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