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.
  • 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: Dec 01 2025 00:00 Version 0.1

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