Constipation in Babies & Toddlers
Content reviewed against published AAP, NASPGHAN, NICE guidelines
Last reviewed:
Constipation in babies is defined by hard, difficult-to-pass stools rather than infrequent stools. Exclusively breastfed babies can go up to 7-10 days between stools and be normal, as long as stools are soft when they come. True constipation is more common in formula-fed babies, when starting solids, and during potty training. It is usually functional and responds to dietary changes.
Key takeaways
- Constipation in babies is defined by hard, difficult-to-pass stools rather than infrequent stools.
- Most common cause: Dietary factors (low fiber, insufficient fluids, cow's milk)
- Emergency: Newborn with no meconium passed in first 48 hours of life
- Home care: For babies on solids: increase fiber (pureed prunes, pears, peas, oatmeal)
Possible Causes
When to Seek Help
Emergency — Call 911 or go to ER:
- Newborn with no meconium passed in first 48 hours of life
- Constipation with bilious (green) vomiting and abdominal distension (possible obstruction)
- Constipation with fever, abdominal distension, and baby appearing very ill
Urgent — See doctor today:
- Significant abdominal distension with vomiting
- Blood in stool with pain and fever
- Newborn with constipation since birth and progressively worsening (Hirschsprung concern)
- Constipation with failure to gain weight appropriately
Same-day appointment:
- Hard painful stools with visible blood (likely anal fissure — needs treatment to break cycle)
- Constipation not responding to 2 weeks of dietary changes
- Toddler showing signs of impaction (soiling around hard stool mass)
Monitor at home:
- Infrequent but soft stools in a breastfed baby (normal)
- Mild firmness of stools with introduction of new foods that improves with dietary adjustments
- Infant dyschezia (straining with soft stools) in baby under 4 months
- Occasional hard stool with no blood and no significant distress
By Age
0-3 months
Normal: Breastfed babies may stool after every feed or go 7-10 days between soft stools — both are normal. Formula-fed babies typically stool 1-3 times daily with firmer consistency. Grunting and straining with soft stools (infant dyschezia) is normal and resolves by 3-4 months.
Worry if: No stool in first 48 hours of life (possible Hirschsprung disease), hard pellet-like stools, blood on stool surface, abdominal distension with vomiting, or failure to thrive.
3-6 months
Normal: Stool frequency often decreases around 2-3 months in breastfed babies. Some babies have 1 soft stool every few days. Straining with soft stools is still common (infant dyschezia).
Worry if: Hard, pellet-like stools causing pain or bleeding. Significant abdominal distension. Progressive worsening constipation since birth (red flag for Hirschsprung).
6-12 months
Normal: Constipation often starts when solids are introduced. Stools may become firmer and less frequent. Brief episodes of hard stools while adjusting to new foods are common.
Worry if: Consistent hard, painful stools despite dietary adjustments. Blood on stool surface (possible anal fissure). Abdominal distension or vomiting. Baby in pain and refusing to eat.
1-3 years
Normal: Constipation peaks around potty training age. Withholding behavior (squeezing legs together, hiding to avoid stooling) is very common and perpetuates the cycle.
Worry if: Soiling (encopresis) around hard stools, significant abdominal distension, poor growth, vomiting, or constipation not responding to standard dietary measures and requiring ongoing laxative use.
Home Care
- For babies on solids: increase fiber (pureed prunes, pears, peas, oatmeal)
- Offer extra water between meals for babies over 6 months
- Prune, pear, or apple juice (1-2 oz diluted) for babies over 4-6 months per doctor guidance
- Bicycle baby's legs gently and provide tummy time to stimulate bowel movement
- Warm bath may help relax the rectal muscles
- For formula-fed babies: discuss formula changes with pediatrician
- For toddlers: regular toilet time after meals (gastrocolic reflex), feet supported on stool
- Avoid constipating foods: excess bananas, rice cereal, applesauce
- Do NOT give enemas, suppositories, or laxatives without doctor guidance for babies
- Do NOT delay treatment of hard stools — the longer stool sits, the harder it becomes (cycle)
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Sources
All content follows our editorial policy and is reviewed against published clinical guidelines.
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Related Symptoms
Bottom line
Most cases of constipation in babies are not emergencies. However, seek immediate care if newborn with no meconium passed in first 48 hours of life.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.