Constipation in Children: Common Causes, Diet Changes and When to See a Doctor

Constipation accounts for 3–5% of all paediatric outpatient consultations and up to 25% of paediatric gastroenterology referrals. It causes significant pain, abdominal discomfort, reduced appetite, and behavioural problems — and in many Indian children, it is undertreated because parents assume it is normal or will resolve on its own.

What Is Constipation in Children?

Constipation is not just about frequency. Normal stool frequency varies by age: breastfed newborns may pass stool after every feed OR once in 7–10 days (both normal); formula-fed infants typically pass stool daily to every 2 days; toddlers and older children: 3 times per day to 3 times per week is normal. Constipation is better defined by stool consistency (hard, pellet-like, or large and painful) and associated symptoms than by frequency alone.

Most Common Cause: Functional Constipation

95% of childhood constipation is functional — no underlying disease. The trigger is often a painful stool experience: the child withholds because they anticipate pain, stool accumulates, becomes harder and larger, the next passage is more painful, creating a vicious cycle. Withholding behaviour — crossing legs, standing on tiptoes, rocking — is a red flag that the child is withholding, not straining to pass.

Dietary and Lifestyle Management

• Hydration: The most underutilised intervention. Children in Hyderabad's hot climate are often chronically dehydrated. Aim for age × 100ml/day as a rough minimum in the hot months
• Fibre: Fruits (papaya, guava, banana, pear with skin), vegetables, whole grains, and legumes. The formula: fibre grams per day = child's age + 5
• Reduce milk: Excess milk (>500ml/day in toddlers) displaces high-fibre foods and contributes to constipation
• Physical activity: Movement stimulates intestinal motility — a sedentary child sitting watching screens all day is predisposed to constipation
• Toilet routine: Sit on the toilet for 5 minutes after meals (gastrocolic reflex) — feet flat on the floor or on a stool

When Medication Is Needed

Osmotic laxatives (PEG — polyethylene glycol, lactulose): First-line medication for functional constipation — safe for prolonged use, non-habit forming. Often needed for several months to break the withholding cycle. Do not use stimulant laxatives (senna, bisacodyl) as a first-line long-term treatment in children.

Red Flags Needing Investigation

• Constipation from birth (Hirschsprung's disease)
• Ribbon stools (very narrow)
• Blood in stool
• Failure to thrive alongside constipation
• Alternating constipation and explosive diarrhoea

For paediatric constipation management: Dr. Sushma B at Sri Anand CNC, Chanda Nagar, Hyderabad. Call +91 90633 66983.