Back Pain in Children: Causes, Signs, and What to Do
- Juliana Lucky
- 7 hours ago
- 7 min read
Most parents don't expect to hear their child complain about back pain. It sounds like something only adults deal with after years of desk jobs and long commutes. But back pain in children is more common than you might think, and in my 15+ years as a posture specialist, I've seen a steady increase in the number of young kids showing up with these complaints. The good news is that in most cases, the causes are identifiable and fixable. In this post, I'll walk you through what triggers back pain in kids, when it's worth paying closer attention, and what you can do at home to help.
Why Back Pain in Children Happens More Than You Think
Research from the American Academy of Pediatrics shows that up to 30% of school-age children report some form of back pain. That number surprises most parents. But when you look at the way kids live today, it starts to make sense.
Children are sitting more than any previous generation. Between school desks, car seats, tablets, and homework, a typical child can spend 8 to 10 hours a day in a seated position. Their spines weren't designed for that. On top of that, many kids carry heavy backpacks, and their developing muscles and bones are still forming. All of this creates a recipe for discomfort.
I want to be clear: back pain in children doesn't automatically mean something serious. Most of the time, it's tied to habits, posture, or muscle weakness that can be addressed with simple changes. That said, knowing what to look for matters.
Common Causes of Back Pain in Kids
When a child says their back hurts, parents often feel a wave of worry. Understanding the most common causes can help you figure out what's going on.
Poor Posture and Slouching
This is the number one cause I see in my practice. Kids who slouch at their desks, hunch over tablets, or sit with their lower backs rounded are putting extra stress on their spinal muscles and ligaments. Over time, these muscles get tired, and that tiredness shows up as pain. If you've noticed your child sitting like a question mark, their posture is likely playing a role. I've written more about this in my post on signs of poor posture in children.
Heavy Backpacks
A backpack that weighs more than 10% to 15% of a child's body weight can pull them backward. To compensate, kids lean forward, which strains the muscles along the spine. According to the American Academy of Pediatrics, overstuffed backpacks are one of the most preventable causes of back discomfort in school-age children.
Weak Core Muscles
The core is the foundation of spinal support. When a child's abdominal and back muscles are weak, their spine doesn't get the support it needs. This is especially common in kids who spend most of their time sitting and don't get enough active movement throughout the day.
Growth Spurts
During rapid growth phases, muscles and tendons sometimes struggle to keep up with bone growth. This can create tightness and discomfort, particularly in the lower back. Growth-related back pain tends to come and go and usually resolves on its own, but it's worth monitoring.
Muscle Strain from Sports or Activity
Kids who play sports can sometimes overdo it, especially if they're repeating the same motion (like throwing, swinging, or tumbling) without proper warm-up or rest. Muscle strain from overuse is another common back pain cause in active children.
Too Much Screen Time
Extended screen time often means extended sitting in awkward positions. Kids curl up on couches, lie on their stomachs with their backs arched, or crane their necks forward to see a screen. These positions put strain on the spine over hours. If screen time is a concern in your house, my post on screen time and posture has practical tips.
Child Back Pain: When to Worry
Most back pain in kids is muscular and not a sign of anything serious. But there are certain signs that tell you it's time to see a doctor.
Talk to your pediatrician if your child's back pain:
Lasts longer than two weeks without improvement
Wakes them up at night
Comes with numbness, tingling, or weakness in the legs
Is accompanied by fever, unexplained weight loss, or changes in bladder or bowel function
Follows a fall, collision, or injury
Gets worse with rest instead of better
The Cleveland Clinic recommends that any back pain in a child under age 10 be evaluated by a healthcare provider, since younger children are less likely to have simple muscle strain and more likely to need further assessment.
I also recommend talking to your doctor if the pain seems to affect your child's willingness to play, move, or participate in activities they usually enjoy. Pain that limits movement deserves attention.
How Posture Connects to Back Pain in Children
In my experience, posture is the thread that ties most childhood back pain together. Even when the original trigger is a heavy backpack or weak muscles, the way a child holds their body determines how much stress lands on their spine.
A child who sits with rounded shoulders and a curved lower back is essentially asking their back muscles to hold up weight that should be shared across the whole trunk. Those muscles fatigue faster, and the ligaments along the spine get stretched beyond their comfortable range.
Here's what I tell parents: posture isn't just about standing up straight. It's about whether your child's body has the strength and awareness to maintain a balanced position throughout the day. That's why strengthening exercises make such a big difference. I cover this connection in detail in my post on exercises for kids who slouch.
Simple Exercises to Help with Children's Back Pain
Before trying any exercises, make sure your child's back pain doesn't have a medical cause that needs treatment first. For general muscular discomfort related to posture, these moves can help build the strength and flexibility that support a healthier spine.
Cat and Cow Stretch
Have your child get on all fours with hands under shoulders and knees under hips. On an inhale, they drop their belly toward the floor and look up gently (cow). On an exhale, they round their back toward the ceiling and tuck their chin (cat). Repeat 8 to 10 times, moving slowly. This warms up the entire spine and relieves stiffness.
Seated Twist
Your child sits cross-legged on the floor. They place their right hand on their left knee and gently twist to the left, looking over their left shoulder. Hold for 5 seconds, then switch sides. This stretch helps release tension in the mid and lower back. Repeat 3 times on each side.
Bridge Hold
Lying on their back with knees bent and feet flat on the floor, your child lifts their hips toward the ceiling. They hold for 5 to 10 seconds, then lower down. This strengthens the glutes and lower back muscles. Start with 5 repetitions and work up to 10.
Superman Lift
Lying face down with arms stretched out in front, your child lifts both arms and both legs an inch or two off the ground at the same time. Hold for 3 to 5 seconds. This exercise builds the muscles along the spine that help with upright posture. Aim for 5 to 8 repetitions.
Dead Bug
Your child lies on their back with arms reaching toward the ceiling and knees bent at 90 degrees. They slowly lower one arm overhead while extending the opposite leg, keeping their lower back pressed against the floor. Return and switch sides. This trains core stability, which takes pressure off the spine. Do 6 to 8 total (3 to 4 on each side).
I recommend doing these exercises 3 to 4 times per week. They take about 10 minutes and don't require any equipment. My Posture and Feet course includes video-guided routines that build on these types of movements, if you're looking for a structured program.
Everyday Habits That Protect Your Child's Back
Exercise is only one part of the picture. Daily habits play an equally important role in keeping back pain away.
Backpack rules: Keep the weight under 10% to 15% of your child's body weight. Use both straps. Adjust the straps so the pack sits against the mid-back, not hanging low near the hips.
Screen time setup: If your child uses a tablet or computer regularly, set up a simple workstation. The screen should be at eye level, and their feet should be flat on the floor or on a step stool. Even small adjustments reduce strain.
Movement breaks: For every 30 minutes of sitting, your child should get up and move for at least 2 to 3 minutes. A quick walk around the room, a stretch, or even standing while reading all count.
Sleep position: A medium-firm mattress supports the spine's natural curves. If your child sleeps on their side, a pillow between their knees can help keep the spine aligned.
Active play: The simplest back pain prevention is regular movement. Kids who climb, run, jump, and play outside develop the muscle strength and flexibility that protect their spines naturally. My post on posture exercises kids can do at home has more ideas for building daily movement habits.
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Quick Quiz: Test Your Knowledge
1. What percentage of school-age children report some form of back pain?
a) 5% b) 15% c) 30% d) 50%
Answer: c) 30%
2. How heavy should a child's backpack be at most?
a) 5% of their body weight b) 10% to 15% of their body weight c) 20% of their body weight d) It doesn't matter
Answer: b) 10% to 15% of their body weight
3. Which of the following is NOT a common cause of back pain in children?
a) Weak core muscles b) Heavy backpacks c) Drinking too much water d) Poor posture
Answer: c) Drinking too much water
4. When should you see a doctor about your child's back pain?
a) If it lasts more than 2 weeks b) If it wakes them at night c) If it comes with numbness or tingling d) All of the above
Answer: d) All of the above
5. How often should children take movement breaks while sitting?
a) Every 2 hours b) Every 30 minutes c) Once a day d) Only when they feel pain
Answer: b) Every 30 minutes
Get a Personal Assessment for Your Child
If your child's back pain has you concerned and you want expert guidance specific to their body, my personal diagnostic gives you a full posture and movement assessment. I'll review your child's alignment, identify the areas that need attention, and give you a clear plan.
A child's back pain is almost always manageable once you understand what's behind it. Small changes in posture, daily habits, and targeted exercises can make a real and lasting difference.
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