For most children, constipation improves with three straightforward changes: more fiber, more water, and a consistent bathroom routine. If those aren’t enough, an over-the-counter osmotic laxative is safe for children over age 3. The right approach depends on your son’s age, so what works for a toddler looks different from what works for a school-aged kid.
For Babies Under 12 Months
Infant constipation calls for gentler interventions than what you’d use for an older child. For babies 1 month and older, try offering a small amount of water first. If that doesn’t help, apple or pear juice contains sorbitol, a natural sweetener that draws water into the intestines and softens stool. Prune juice works the same way and can be introduced after 3 months. Keep juice under 4 ounces per day unless your pediatrician says otherwise. For babies between 1 and 6 months, 1 to 2 ounces of prune juice daily is a reasonable starting point. Babies 6 to 12 months can handle 2 to 6 ounces.
If your baby has started solid foods, adding pureed prunes, pears, peas, or beans can help. Physical techniques also work well at this age: gently massage your baby’s belly in a clockwise motion, hold their knees up to their chest to mimic a squatting position, or slowly move their legs in a bicycling motion. These movements help stimulate the muscles involved in passing stool. Do not give mineral oil, stimulant laxatives, or enemas to infants.
Fiber-Rich Foods That Help
For toddlers and older kids, increasing dietary fiber is the single most effective long-term fix. Fiber adds bulk to stool and helps it move through the intestines more easily. Most children don’t get enough. Here’s what they need each day:
- Ages 1 to 3: 19 grams
- Ages 4 to 8: 25 grams
- Boys 9 to 13: 31 grams
- Girls 9 to 13: 26 grams
- Teen boys 14 to 19: 38 grams
- Teen girls 14 to 19: 26 grams
The best sources are whole grains (oatmeal, whole wheat bread and pasta, bran cereal), legumes (lentils, black beans, chickpeas), fruits with skin on (apples, pears, berries, oranges), and vegetables (broccoli, carrots, green peas). Nuts like almonds and peanuts also pack a lot of fiber, though they’re only appropriate for kids old enough to chew them safely. If your son is a picky eater, start by swapping white bread for whole wheat, mixing beans into pasta sauce, or offering berries as a snack. Increase fiber gradually over a week or two, since adding too much at once can cause gas and bloating.
How Much Water Your Son Needs
Fiber works by absorbing water to create softer, bulkier stool. Without enough fluids, extra fiber can actually make constipation worse. The American Academy of Pediatrics recommends 4 cups of fluids per day for children ages 1 to 3, 5 cups for ages 4 to 8, and 7 to 8 cups for older kids and teens. Water and milk both count. Fruit juice counts too, but it’s better used as a targeted remedy (prune, pear, or apple juice) rather than a hydration staple because of its sugar content.
Over-the-Counter Stool Softeners
When dietary changes aren’t enough, polyethylene glycol 3350 (sold as MiraLAX and store-brand equivalents) is the most widely recommended option for children over 3. It’s an osmotic laxative, meaning it pulls water into the intestines to soften stool. It dissolves in water, juice, or another liquid and is tasteless, which makes it easier to get kids to take.
For maintenance (keeping things regular over time), the typical dose is 0.5 to 1.5 grams per kilogram of body weight per day. A simple way to calculate it: divide your child’s weight in kilograms by 4, and that’s roughly the number of ounces of the mixed solution per dose. So a 44-pound (20 kg) child would get about 5 ounces of the mixed solution. Your pediatrician can help you dial in the right amount.
If your son is already backed up and needs more immediate relief, a short course at higher doses for 3 to 7 days can help clear things out before switching to a lower maintenance dose. There’s no evidence that using osmotic laxatives for extended periods causes long-term side effects, so don’t worry if your child needs to stay on it for weeks or even months while you build better habits around diet and bathroom routines.
Bathroom Habits That Make a Difference
Many kids, especially toddlers and preschoolers, develop constipation partly because they avoid the toilet. Sometimes it starts with one painful bowel movement, which makes them hold it in next time, which makes the next one harder and more painful. Breaking this cycle requires making the bathroom feel safe and routine rather than stressful.
Scheduled “toilet sits” are one of the most effective behavioral tools. Have your son sit on the toilet for 5 to 10 minutes after meals, particularly after breakfast and dinner. Eating triggers a natural wave of muscle contractions in the colon (called the gastrocolic reflex), so sitting after meals takes advantage of the body’s own timing. Let him read, play a game on a tablet, or blow bubbles during these sits. The goal is to create a positive, low-pressure association with the toilet. Keep a simple diary of when he sits and whether he goes. Patterns will emerge that help you identify his body’s natural schedule.
For younger kids still in the early stages of potty training, a footstool is essential. Feet dangling off the floor makes it physically harder to push. A stool that lets your son plant his feet and lean slightly forward puts his body in a better position.
Signs That Need Medical Attention
Most childhood constipation is functional, meaning there’s no underlying disease. But certain symptoms suggest something more is going on. See your child’s doctor if constipation lasts longer than two weeks despite home remedies, or if it comes with any of the following: fever, blood in the stool, abdominal swelling, weight loss, refusal to eat, pain during bowel movements, or any tissue protruding from the anus. These warrant evaluation to rule out less common causes.