It almost always happens at the worst time. Bedtime, or an hour after your child has fallen asleep, and suddenly they are crying about their legs, rubbing their calves or the backs of their knees, saying it hurts and they do not know why. You rub the spot, maybe reach for a warm washcloth, and eventually the crying settles and your child falls back asleep as if nothing happened. Your pediatrician has probably told you this is normal, just growing pains, nothing to worry about. That label is common, but it leaves a real question unanswered: why does it hurt in the first place.
What Growing Pains Actually Look Like
Growing pains typically show up as an aching or throbbing sensation in both legs at once, most often in the front of the thighs, the calves, or behind the knees. They tend to strike in a predictable window, late afternoon, evening, or right around bedtime, and episodes can last anywhere from a few minutes to a couple of hours. By morning, the pain is almost always gone, and it typically does not stop a child from running around and playing sports the next day. Some kids also report headaches or a stomachache along with the leg pain. The pattern usually starts somewhere between three and twelve years old.
The Name Does Not Match the Evidence
Here is the part that surprises a lot of parents: there is no solid evidence that the actual process of bones lengthening causes pain. Bone growth happens gradually and is not typically associated with the kind of sharp, come and go aching that shows up at night. The name growing pains has stuck around because it is a convenient way to reassure parents that nothing serious is going on, and in most cases that reassurance is accurate. It just does not explain the mechanism.
What Seems to Be Driving It Instead
A more useful way to think about growing pains is as a nervous system pattern rather than a bone growth issue. Three things tend to be at play: physical tension or restriction somewhere in the spine or lower body, ongoing tightness in the muscles and connective tissue around the legs, and a nervous system that has a harder time fully releasing that tension, especially once the body slows down at bedtime. During the day, activity and movement can mask tension the same way adrenaline can mask a sore muscle. At night, when the body finally sits still, that tension has nowhere left to hide, and it often shows up as pain.
This may be part of why kids with sensory processing differences, autism, or anxiety tend to report growing pains more intensely than their peers. A nervous system that already runs a bit more sensitive to input in general is also likely to register that end of day tension release more acutely.
Why an Overactive Nervous System Fits the Pattern
When a child's sympathetic fight or flight response stays a little more engaged than it needs to be, even during ordinary daily activity, tension has a harder time fully discharging through normal movement and play. That leftover tension tends to surface once the distractions of the day fall away, which lines up closely with when growing pains typically strike. It also explains why growing pains often travel with other signs of a nervous system working a little too hard, restless sleep, a harder time settling at bedtime, or a child who seems generally more sensitive to their environment than other kids their age.
What Care Looks Like
We start by hearing your child's pattern: which nights it happens, where exactly it hurts, and what else you have noticed about their sleep and daily regulation. From there, a gentle exam and INSiGHT neurological scanning help us see where tension is being held in the spine and nervous system. Using Koren Specific Technique and Talsky Tonal Chiropractic, our doctors use light, nervous system focused contacts to help that tension release more fully during the day, rather than building up and surfacing at night. Many families notice fewer and less intense episodes over the first several weeks, along with better sleep overall, since the two tend to move together.
What Helps Between Visits
- A warm bath or gentle leg massage before bed can ease an active episode
- Consistent daytime movement and outside time gives the nervous system a chance to discharge tension through the day rather than at night
- Keeping bedtime calm and predictable supports the same settling process
- A simple log of which nights are worse can reveal useful patterns tied to activity, stress, or sleep debt
Where to Go From Here
If nighttime leg pain is a regular visitor in your house, it is worth looking past the reassuring label and understanding what your child's nervous system is actually doing. You can learn more about how we support growing pains, or get our free guide on the nervous system side of nighttime leg aches. When you are ready, book a consultation with our doctors in Royal Oak, or call us at (248) 616-0900.
