Self Care Articles

Constipation (0-12 Months)

2026-01-01

Version:

0.2
Active

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)
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Copyright 2000-2026 Schmitt Pediatric Guidelines LLC. Date Updated: 2025-12-01T09:04:58.260Z Version 0.2

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Changes from the previous version.

Added the bullet point "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." to the heading Causes of Constipation.