Diet and Constipation in Children: Practical Advice for Parents

Constipation is one of the most common digestive concerns seen in children. It can affect babies, toddlers, and older children, often causing discomfort, tummy pain, reduced appetite, and anxiety around using the toilet.

The good news is that, alongside medical treatment where needed, diet and lifestyle can play an important role in helping to manage constipation and support healthy bowel habits.

What Is Constipation?

Constipation is more than simply not going to the toilet every day.

A child may be constipated if they:

• Pass hard, dry or large stools

• Strain or experience pain when having a poo

• Go several days without opening their bowels

• Avoid using the toilet

• Have tummy pain or bloating

• Have episodes of soiling or leaking stools into their underwear

Every child is different. Some children naturally poo several times a day, while others may only go every other day. It's the consistency of the stool and how easily it passes that are often the most important factors.

Why Does Constipation Happen?

There are many reasons why children become constipated.

Common causes include:

• Not drinking enough fluids

• A diet low in fibre

• Withholding stools because of previous painful experiences

• Changes in routine, such as starting nursery or school

• Toilet training

• Illness or reduced appetite

Often, constipation develops gradually and can become a cycle—hard stools cause pain, leading a child to avoid going to the toilet, making the stools even harder.

Can Diet Help?

Diet is an important part of managing constipation, although it is not always the sole cause.

Simple changes can help support healthy bowel movements alongside any treatment recommended by your healthcare professional.

Fibre: Why It Matters

Fibre helps add bulk to stools and supports healthy bowel function.

Foods naturally rich in fibre include:

Fruit

• Pears

• Apples (with the skin on where appropriate)

• Berries

• Kiwi fruit

• Oranges

Vegetables

• Broccoli

• Peas

• Sweetcorn

• Carrots

• Sweet potato

Wholegrains

• Wholemeal bread

• Wholegrain breakfast cereals

• Porridge oats

• Brown rice

• Wholewheat pasta

Beans and Pulses

• Lentils

• Chickpeas

• Kidney beans

• Baked beans

Increasing fibre gradually is important, as making large changes too quickly can sometimes cause bloating or discomfort.

Don't Forget Fluids

Fibre works best when there is enough fluid in the diet.

Encourage regular drinks throughout the day, particularly:

• Water

• Milk (within age-appropriate recommendations)

If a child increases their fibre intake without drinking enough, constipation may actually become worse.

Is Dairy Causing Constipation?

Many parents wonder whether dairy is responsible for constipation.

For most children, there is no evidence that milk or dairy products cause constipation, and they remain an important source of calcium and other nutrients.

However, in a small number of children—particularly those with Cow's Milk Protein Allergy (CMPA)—constipation can be one of several symptoms. If constipation is persistent, severe, or occurs alongside symptoms such as eczema, reflux, blood in stools, or poor growth, further assessment may be needed.

Dairy should not be removed from your child's diet unless advised by a healthcare professional.

Establishing Healthy Toilet Habits

Diet is only one piece of the puzzle.

Helpful habits include:

• Encouraging your child to sit on the toilet after meals

• Using a footstool so knees are above hips

• Allowing enough time without rushing

• Praising effort rather than success

• Keeping toilet time calm and pressure-free

These small routines can make a big difference over time.

When Diet Alone Isn't Enough

Many children with constipation require medication to help soften stools while healthy bowel habits are established.

Laxatives are often recommended by healthcare professionals and can be an important part of treatment.

Parents sometimes worry that children will become dependent on laxatives, but when used appropriately under medical guidance, they are considered safe and can help prevent constipation from becoming a long-term problem.

Never stop prescribed constipation medication without discussing it with your healthcare professional.

How a Children's Dietitian Can Help

A specialist paediatric dietitian can:

• Review your child's diet and fluid intake

• Assess whether nutritional intake is appropriate for their age

• Provide practical ways to increase fibre

• Support children with selective eating or sensory difficulties

• Work alongside your GP or paediatrician if medical treatment is required

Every child is different, so advice should always be tailored to their individual needs.

When Should You Seek Further Advice?

It is important to speak to your GP or healthcare professional if your child:

• Has constipation that lasts several weeks

• Has severe tummy pain

• Has blood in their stools (that isn't from a small tear)

• Is losing weight or not growing well

• Is vomiting regularly

• Has constipation from birth or in early infancy

• Is not improving despite treatment

Early support can prevent constipation becoming more difficult to manage.

Final Thoughts

Constipation is common, but it doesn't have to become part of everyday life.

A balanced diet, adequate fluids, regular toilet routines, and appropriate medical treatment where needed can help children develop healthy bowel habits and feel more comfortable.

If you're worried about your child's constipation or would like personalised dietary advice, a specialist children's dietitian can help you create a practical plan that works for your child and your family.