Welcome to the new KidsHealth website! See what is new.

Header

Low or no data? Visit zero.govt.nz, search for KidsHealth, and click on our logo to return and browse for free. Need help?

For free medical advice call Healthline 0800 611 116. Healthline provides a 24 hour, 7 days a week, over-the-phone health service. For emergencies call 111.  

On this page

Key points about constipation

Making sure your child has plenty of water to drink, and enough fibre in their diet, can help prevent constipation.

  • constipation is when your child has hard, infrequent poo
  • it is a common problem in childhood
  • constipation often starts after 1 hard poo has caused pain and so your child has tried to avoid pain the next time by 'holding on' to the poo, resulting in a vicious cycle
  • increasing the fluid your child drinks and the amount of fibre in their diet can help prevent constipation
  • laxatives are often necessary - they work by making the poo softer and easier to poo out
  • sitting on the toilet regularly is important
  • children often need laxatives for months and sometimes years to manage the problem
 Illustration of a child with a normal digestive system and two close-up views of the intestines showing different stages of constipation. The first close-up shows constipation with the rectum overloaded with stool. The second shows worse constipation, with stool backed up through the large intestine. Labels identify the stomach, large intestine, small intestine, and rectum.

Normal poo

There is a wide range of normal pooing for breastfed babies. They may poo as often as after every feed or as infrequently as once in 10 days. Breastfed babies' poo is mustard yellow, soft and can look like it has seeds in it.

Most bottlefed babies and older children will have a poo every day or every second day. Some have more than one poo a day. The poo should be like a soft sausage - like types 3 and 4 in the diagram below.

Bristol stool chart showing different types of poo

What is constipation?

If your child of any age has firm, hard or painful poo, they are likely to be constipated. If children are not breastfeeding and are pooing less than every 3 days, they are likely to be constipated.

Signs and symptoms of constipation

Your child may be constipated if they have some of the following:

  • large and hard poo
  • hard 'pebble-like' poo
  • no poo for 3 or more days
  • pain or crying when having a poo
  • bright blood around the poo due to tears in the skin around the anus (anal fissures)
  • tummy pain
  • urinary tract infections, wetting pants (urine incontinence), bedwetting - constipation can increase the risk of these
  • liquid poo that may leak out at times in between harder poo
  • soiling accidents (encopresis)

Causes of constipation

Constipation in children is common.

There are many possible reasons for your child's constipation. Often, it is several things:

  • not drinking enough water
  • weaning from breastmilk to formula
  • starting solids
  • not having enough fibre (vegetables, fruits, whole grains) - ready-made food and takeaways are low in fibre
  • not doing much physical activity
  • not eating and drinking as much as normal, for example when your child is unwell
  • a natural tendency to having slower gut movement

Toileting habits are important. Your child can become constipated if they:

  • ignore the urge to do a poo
  • don't let all the poo come out when going to the toilet
  • don't sit on the toilet regularly
Caption and credit

More information about constipation.

Source: Pediatric Gastroenterology Clinic, Primary Children's Hospital, US.  

How constipation can cause a vicious cycle

Constipation often starts after 1 hard poo has caused pain. The natural response to a painful experience is to try and avoid or escape it in the future. So, the next time your child feels the urge to poo, they 'hold on' in an attempt to avoid passing another painful poo. This results in the poo becoming firmer, larger and even more painful to poo out and your child becomes even more reluctant to poo in the future.

This leads to a vicious cycle:

Graphic showing the cycle of constipation

The key to stopping this cycle is making the poo soft again. Find out what you can do about your child's constipation. 

Constipation In Children

When constipation continues for a long time

If constipation continues for a long time and all the poo doesn't come out, the bowel can become overloaded and stretched. The overloaded and stretched bowel means the feeling of needing to do a poo is lost and can cause soiling accidents.

Soiling In Children 

Could childhood constipation be due to an abnormal bowel?

Constipation is hardly ever due to an abnormal bowel. Most bowel problems show up in early life and are diagnosed within the first few months. Occasionally, constipation in children can be due to coeliac disease.

If your child passed meconium (the green/black poo newborn babies pass) within 24 hours of birth, it is unlikely your child has a bowel problem causing constipation.

Your doctor may suggest your child sees a specialist nurse or doctor if:

  • your child's constipation is proving difficult to treat after standard treatments or,
  • your doctor thinks there may be another condition causing your child's constipation 
Acknowledgements

Bristol stool chart image reproduced and adapted from Wikimedia Commons
License https://creativecommons.org/licenses/by-sa/3.0/
Cabot Health, Bristol Stool Chart
CC BY-SA 3.0
File: BristolStoolChart.png
Created: 1 January 2014
https://commons.wikimedia.org/wiki/Category:Bristol_Stool_Chart#/media/File:BristolStoolChart.png

Illustration of child showing constipation and worse constipation - by Dr Greta File. Property of KidsHealth. 

References

ESPGHAN and NASPGHAN. 2014. Evaluation and treatment of functional constipation in infants and children: Evidence-based recommendations from ESPGHAN and NASPGHAN.

Royal Children's Hospital, Melbourne. Clinical Practice Guideline: Constipation.

National Institute for Health and Clinical Excellence, U.K. May 2010. (Updated 2017). Constipation in children and young people.

Last reviewed
Shielded site