Constipation in Children: What's Normal and When to Worry
In short: Most constipation in babies and children is not caused by anything serious. It usually starts with one hard, painful poo, after which the child starts holding on, and the cycle builds from there. Poo frequency varies a lot between children, so the number of days matters less than whether the poo is hard, painful or difficult to pass. A few red flags, such as constipation from birth, a swollen tummy with vomiting, or leg weakness, need a doctor promptly.
Key takeaways
A breastfed baby over 6 weeks old can go up to a week without a poo and still be perfectly well, as long as the poo is soft when it comes.
Constipation is about hard, painful or difficult poos, not only about how many days pass between them.
About 95% of childhood constipation is "functional", meaning there is no underlying disease. Holding on because of pain is the usual driver.
Leaking runny poo into the pants is often a sign of severe constipation, not diarrhoea.
When constipation has set in, medicine from your doctor plus a toilet routine works better than diet changes alone, and treatment often needs to continue for months.
What counts as constipation in a child?
A child is constipated when their poo is hard, painful or difficult to pass, or when they go much less often than usual for them. The number of days on its own does not tell you much.
Doctors use a simple test. If, for at least a month, your child has two or more of these, it counts as constipation:
Two or fewer poos a week
Holding on, such as stiffening, crossing legs or hiding in a corner
Painful or hard poos
Very large poos, sometimes big enough to block the toilet
Soiling (poo leaking into the pants) at least once a week, in a child who is toilet trained
A single hard poo after a busy weekend is not constipation. A pattern of hard, painful poos is.
How often should a baby or child poo?
Normal poo frequency changes with age and feeding, and the range is wide. This is where many parents worry unnecessarily.
Newborn, first week: first poo (meconium) within 48 hours of birth, then several a day
Breastfed, under 6 weeks: often several a day, soft and yellow
Breastfed, over 6 weeks: anywhere from several a day to once every 7 to 10 days
Formula-fed babies: usually once or twice a day, firmer and paler than breastfed poo
Toddlers (1 to 3 years): roughly three times a day to three times a week
Older children: roughly three times a day to three times a week
My baby strains and goes red. Is that constipation?
Usually not. Many babies under 9 months strain, grunt and go red in the face for several minutes before passing a perfectly soft poo. Doctors call this infant dyschezia. Your baby is learning to relax the bottom muscles while pushing with the tummy at the same time. It settles on its own, and it does not need laxatives or rectal stimulation.
If the poo that comes out is soft, your baby is not constipated, however dramatic the effort looks.
Why do children get constipated?
In most children, constipation starts with one painful poo, and fear of the next one keeps it going. The child holds on, the poo sits in the bowel longer, more water is absorbed, and it gets harder and more painful. This is the cycle a paediatrician is trying to break.
Common triggers include:
Starting solids. The change in diet often firms up the poo around 6 months.
Switching from formula to cow's milk around 12 months, especially when a toddler drinks a lot of milk and eats less solid food.
Toilet training. Pushing too early, or a frightening first experience on the toilet, can start a holding pattern.
Starting nursery or school. Many children avoid unfamiliar or unclean school toilets and hold on all day. This links closely to school readiness.
Illness and travel. Fever, low fluid intake and a change in routine during holidays can all set it off.
Not enough fluid in hot weather. Malaysia's heat means children lose more water than parents expect, especially after outdoor play.
Only about 5% of children have a medical cause, such as a problem with the nerves of the bowel, an underactive thyroid, coeliac disease or, in a small number, cow's milk protein allergy. The red flags below are how doctors pick out this smaller group.
Signs your child may be constipated
The signs go beyond "not pooing". Watch how your child behaves around the toilet.
Hard, dry, pellet-like poo, or very large poo
Pain or crying when passing poo
A streak of fresh blood on the poo or nappy, usually from a small tear (anal fissure)
Holding on: standing on tiptoes, crossing legs, rocking, or hiding to "go" in a nappy
Tummy ache that comes and goes, often around meals
Poor appetite that improves after a big poo
Runny poo or smears leaking into the pants
That last one surprises many parents. When a large, hard mass of poo builds up, looser poo from higher up leaks around it. It looks like diarrhoea, and children often cannot feel it or control it. It is called overflow soiling, and it is never the child's fault.
When to see a doctor, and when not to worry
Most constipation can be managed calmly at home or with a routine visit. A small number of signs need a doctor the same day.
Usually fine to watch, or raise at a routine visit
A breastfed baby over 6 weeks old who goes several days without a poo, is feeding well, and passes soft poo
A baby who strains and goes red before passing soft poo
One or two hard poos after a change in diet, illness or travel
Mild constipation that improves within a week with more fluid and fruit
Book an appointment soon if
Constipation lasts more than 2 weeks despite home measures
Your child is in pain with every poo or is scared to go
There is soiling or leaking into the pants
You keep seeing blood streaks on the poo
It keeps coming back after treatment
Your child is eating poorly or not gaining weight
See a doctor the same day if
Your baby did not pass meconium within 48 hours of birth, or has been constipated since the first few weeks of life
The tummy is very swollen, especially with vomiting, and above all green vomit
There is fever with a swollen, painful tummy
Your child has weakness in the legs, a change in walking, or problems with bladder control
You notice a dimple, tuft of hair or lump at the base of the spine
The poo is very thin, like ribbon, from early infancy
There is a lot of blood, not just a streak
Your baby is under 3 months and constipated while formula feeding or after a formula change, and seems unwell
What you can do at home
For mild constipation, small daily changes are often enough. Consistency matters more than any single remedy.
For babies under 6 months
Keep breastfeeding as normal. Breastfed babies rarely get true constipation.
If formula feeding, make up feeds exactly as the tin says. Too much powder can make poo hard.
Gentle tummy massage in a clockwise circle and "bicycle legs" can help.
Do not change formula brands repeatedly. It is rarely the answer and can make it harder to see what is working. Talk to your doctor first.
Ask your doctor before giving water, juice or any remedy to a baby under 6 months.
For babies on solids and toddlers
Offer fruit at every meal. Pear, papaya, prunes, kiwi and dragon fruit work well. Purée them for younger babies.
Add fibre gradually, from oats, wholemeal bread, beans, lentils and vegetables.
Offer water regularly, especially in hot weather and after play.
Watch the milk. After age one, more than about 500 ml (2 cups) of milk a day can fill a toddler up and push out fibre-rich food.
For toilet-trained children
Sit on the toilet for 5 minutes after meals, once or twice a day. Eating naturally wakes the bowel.
Use a footstool so the knees sit higher than the hips. It makes pushing much easier.
Praise sitting, not just success. A sticker chart for trying works better than one for results.
Never punish accidents. Soiling is usually involuntary, and shame makes holding worse.
Check the school toilet situation. If your child refuses to use it, tell the teacher and plan a morning routine at home.
What not to do
Do not insert soap, cotton buds, thermometers or other objects into the bottom to "help it out".
Do not give honey to babies under 12 months.
Do not use adult laxatives, enemas or suppositories without a doctor's advice.
Do not stop prescribed treatment as soon as things improve. This is the most common reason constipation comes back.
From Dr Nisa's clinic: Many families I see have already changed formula two or three times, cut out foods and tried every home remedy before they come in. Usually the child is simply holding on because it hurt once. When we treat the pain and the fear, and give the bowel time to recover its normal size, most children get back to comfortable poos. The part that takes patience is staying on treatment long enough.
How a paediatrician treats constipation
Treatment has two goals: clear out the hard poo already stuck, then keep poo soft long enough for the bowel to recover and the fear to fade.
At your visit, the paediatrician will ask about your child's poo pattern, diet, toilet habits and when it started. They will examine the tummy, check growth, and look at the back and spine. Most children do not need blood tests or X-rays.
Treatment usually involves:
Clearing out (disimpaction). If there is a large build-up, a stronger course of oral laxative over a few days clears it. This is usually done at home.
Maintenance. A daily stool softener keeps poo soft so passing it stops hurting. The usual first choice is a medicine called macrogol, mixed into a drink.
Time. The bowel may have stretched from holding large poos. It often needs several weeks to months of soft, regular poos to return to normal. Treatment is then reduced slowly, not stopped suddenly.
Routine and diet. These support the medicine but, when constipation is established, usually do not replace it.
Follow-up. Regular reviews help adjust the plan and catch relapses early.
If treatment is not working, or a red flag is present, your child may be referred for further tests or to a paediatric gastroenterologist.
Many parents worry that their child will become dependent on laxatives. The medicines used in children are not habit-forming in that way. The bigger risk is stopping too early, which lets the cycle start again.
Worried about your child's poo?
Dr Nisa Khalil is a consultant paediatrician with over 18 years of experience, seeing babies, children and teenagers at ParkCity Medical Centre, Kuala Lumpur. If constipation is causing your child pain or worry, she can help find the cause and build a plan that fits your family.
Book an appointment or, for follow-up questions, use an online eConsult.
You may also find these helpful:
Frequently asked questions
How many days can a baby go without pooing?
A breastfed baby over 6 weeks old can go up to 7 to 10 days without a poo and be completely healthy, as long as they are feeding well, not vomiting, and the poo is soft when it comes. Formula-fed babies usually go at least every day or two. A newborn should pass their first poo within 48 hours of birth. If they don't, or if your baby seems unwell, see a doctor.
Is it normal for my baby to strain when pooing?
Yes, if the poo is soft. Many babies under 9 months strain, grunt and go red before passing a normal poo while they learn to coordinate their muscles. This is called infant dyschezia and it settles by itself. Hard, pellet-like poo, blood or a swollen tummy are different and worth checking with a doctor.
What fruits help with constipation in children?
Pear, prunes, papaya, kiwi and dragon fruit are good choices, along with plenty of water. These add fibre and natural sugars that soften poo. For babies starting solids, offer them puréed. Diet helps prevent constipation and eases mild cases, but if your child is already in pain or holding on, they will usually also need a stool softener from their doctor.
Can too much milk cause constipation?
Yes, in toddlers. After 12 months, drinking a lot of cow's milk or formula fills children up, so they eat less fibre-rich food. The American Academy of Pediatrics advises no more than about 470 to 750 ml a day after age one, and for a constipated toddler, staying near the lower end often helps. In a small number of children, cow's milk protein allergy causes constipation that does not respond to usual treatment, which your doctor can assess.
Is my child's runny poo diarrhoea or constipation?
It can be either, so look at the whole picture. If your child also has hard poos, pain, holding behaviour, or poo leaking into their pants without noticing, it is more likely overflow from severe constipation. Treating it as diarrhoea makes it worse. If your child has fever, vomiting or signs of dehydration, see our guide to diarrhoea and vomiting.
Are laxatives safe for children?
Yes, when prescribed by a doctor. Medicines like macrogol are widely used in children, including for months at a time, and are not habit-forming. The most common problem is stopping them too soon, before the bowel has recovered. Your paediatrician will reduce the dose slowly. Do not use adult laxatives, enemas or suppositories without medical advice.
When should I take my child to a doctor for constipation?
Book a visit if constipation lasts more than 2 weeks, causes pain or fear, leads to soiling, or keeps coming back. Go the same day if your baby has been constipated since birth, the tummy is swollen with vomiting, there is fever with tummy pain, or your child has leg weakness or a change in walking.
Medically reviewed by Dr Nisa Khalil on 12 October 2026. This article is general information and does not replace a consultation with your own doctor.
References
National Institute for Health and Care Excellence (NICE). Constipation in children and young people: diagnosis and management (CG99). nice.org.uk/guidance/cg99
Gordon M, et al. ESPGHAN/NASPGHAN guidelines for treatment of functional constipation in children aged 0 to 18 years. Journal of Pediatric Gastroenterology and Nutrition, 2025.
Hyams JS, et al. Childhood functional gastrointestinal disorders: child/adolescent (Rome IV). Gastroenterology, 2016.
Benninga MA, et al. Childhood functional gastrointestinal disorders: neonate/toddler (Rome IV). Gastroenterology, 2016.
American Academy of Pediatrics, HealthyChildren.org. Constipation in children. healthychildren.org
Worried about your child?
Book an appointment with Dr Nisa Khalil for calm, evidence-based paediatric care when your child is unwell.
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