Baby Constipation: What Helps (and When to Worry)

By Fangfang • July 1, 2026

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Quick answer

Babies vary a lot in how often they poo, so frequency alone rarely means constipation. The real signs are hard, dry, pebble-like stools and obvious straining or discomfort. Gentle tummy massage, bicycle legs and a warm bath often help — and for formula-fed or weaning babies, a little extra water or fibre can too. Call your doctor if your baby is under 6 weeks, has blood in the stool, a swollen tummy, or seems unwell.

If your baby is straining, grunting or going longer than usual between dirty nappies, it’s natural to worry. The good news: true constipation in babies is less common than it looks, and when it does happen, gentle steps at home usually help. Here’s how to tell what’s really going on — and what to try.

What does baby constipation actually look like?

Frequency varies enormously between babies, so how often your baby poos is rarely the whole story. The real signs of constipation are about how the poo looks and how hard it is to pass:

  • Hard, dry, pellet-like stools — small firm balls rather than soft and mushy.
  • Clear straining or discomfort — crying, drawing the legs up, a red face, a firm tummy.
  • Fewer, larger, very hard poos after a stretch of none.
  • Sometimes a small streak of blood on a very hard stool, from a tiny tear.

What is not constipation: lots of red-faced grunting while passing a soft poo (newborns are simply learning to coordinate the muscles), or a breastfed baby happily going several days between soft nappies. It’s the texture and effort that matter, not the calendar.

Why is my baby constipated? (causes by feeding stage)

Common causes change as your baby grows and what goes in changes:

Feeding stageCommon triggers
BreastfedGenuine constipation is rare; infrequent soft poos are usually normal, not blocked
Formula-fedFormula made too strong, a recent formula change, or simply needing a little more fluid
Starting solids (~6m)A big diet change — new foods, less milk, not enough fibre or water
Any stageA cold or fever (dehydration), teething, or a change in routine

For formula-fed babies, the single most useful check is how the formula is mixed: always add the exact amount of water the tin states, and add powder to water (not the other way round). Formula that’s too concentrated is a frequent, easily-fixed cause.

How can I relieve baby constipation gently at home?

For most babies, a few simple, soothing measures do the trick:

  • Tummy massage. With clean, warm hands, gently stroke your baby’s tummy in slow clockwise circles around the belly button.
  • Bicycle legs. Lay your baby on their back and gently move their legs in a slow cycling motion — this helps move things along.
  • A warm bath. Warmth relaxes the tummy muscles and can encourage a poo.
  • Extra fluids (age-appropriate). Formula-fed and weaning babies may benefit from a little extra cooled boiled water between feeds — check with your provider first, especially under 6 months.
  • Fibre for weaning babies. From around 6 months, the “P” fruits and veg — prunes, pears, peaches, peas — and other soft fruit and veg can soften stools. Easing off on lots of rice, banana and other binding foods can help too.

Do not use suppositories, laxatives, enemas or stimulate the bottom unless a doctor has specifically told you to — and don’t give honey to a baby under 12 months.

How do I prevent it coming back?

Once things are moving again, a few habits keep them comfortable:

  • Mix formula exactly as the instructions say, every time.
  • Offer fluids appropriately for your baby’s age, especially in hot weather or with illness.
  • Balance the diet as solids expand — plenty of soft fruit and veg alongside the binding foods.
  • Keep moving. Floor time, kicking and (later) crawling all help digestion.

Most spells of constipation pass within a few days with these gentle steps. A little patience and a calm tummy massage go a long way.

When should I call the doctor?

Most baby constipation is mild and short-lived, but some signs mean it’s time to get checked. Contact your doctor, health visitor or midwife promptly if your baby:

  • is under 6 weeks old and constipated;
  • has blood in the stool (more than a tiny streak), or ongoing blood;
  • has a hard, swollen or tender tummy, or is vomiting;
  • is refusing feeds, losing weight, or not gaining as expected;
  • seems generally unwell, floppy or unusually sleepy; or
  • isn’t better after a few days of home measures.

Trust your instincts — if something feels wrong, it’s always okay to ask. Your healthcare team would far rather you checked than worried alone.

This is general information, not medical advice — check with your doctor or midwife. Always seek prompt medical advice if your baby seems unwell or you’re worried.

Frequently asked questions

How do I know if my baby is constipated, not just going less often? +

Look at the poo, not the calendar. Constipation means hard, dry, pellet-like stools that are clearly hard to pass — often with straining, crying or a firm tummy. A baby who goes every few days but passes soft poo comfortably is usually fine.

Is it normal for a breastfed baby to go days without pooing? +

Yes. After the first few weeks, fully breastfed babies can go several days — sometimes a week or more — between poos and still be perfectly healthy, as long as the stool is soft when it comes. Breast milk is very well absorbed, so there is simply less waste.

Can I give my baby water or juice for constipation? +

Babies under 6 months who are exclusively milk-fed do not usually need extra water — speak to your doctor first. For weaning babies (around 6 months+), small amounts of cooled boiled water can help, and your provider may suggest a little diluted fruit juice such as prune or pear.

When should I call a doctor about baby constipation? +

Call promptly if your baby is under 6 weeks old, has blood in the stool, a hard or swollen tummy, is vomiting, refusing feeds, losing weight, or seems generally unwell — or if home measures do not help after a few days.