When Do Growing Pains Stop? Ages 3 to 12

Growing pains belong to a defined age window: onset between 3 and 12 years, peaking at 4 to 6. For most children the episodes thin out and disappear somewhere inside that window, usually before adolescence. There is no single stopping age, because the condition is defined by a pattern rather than by a birthday.

What the age window actually says

The 2022 proposed definition asks that the pain started between the ages of 3 and 12 and that it has been intermittent for at least three months. That is a criterion for onset, not for duration — a child whose pains began at 5 may still get an occasional episode at 9 and remain squarely within the description.

Lifetime prevalence sits around 15% across studies, with individual surveys ranging widely; the AAP’s own figure is about 10% of healthy children. The wide range is a symptom of the diagnosis itself: there are no laboratory findings, so counting depends on who is asking and how.

Why they arrive in waves

Nothing about the condition is continuous. A cluster of painful nights, then weeks or months of nothing, then another cluster — that is the shape the definition anticipates when it calls the pain intermittent. The AAP’s explanation, muscle soreness that surfaces after hard play once the muscles relax, fits the pattern: the waves tend to track how active the season has been, not how fast the child is growing.

The features that stay constant through every wave are the ones listed in growing pains symptoms: both legs, muscles rather than joints, late in the day, and completely gone by morning.

A late start is a different question

Pain that begins for the first time after 12, or that arrives with a limp, a swollen joint, or morning stiffness, is not a growing pain that ran long. It is something else that has been labeled with a familiar name. Adolescence brings its own causes of limb pain — Osgood-Schlatter disease, slipped capital femoral epiphysis, osteoid osteoma — and each is diagnosed rather than waited out.

When to stop waiting

Reassess with your pediatrician if the episodes change character: one leg instead of both, pain that persists into the day, a new limp, a joint that is swollen or warm, fever, weight loss, or crying when the leg is touched. Those signals and what they point to are laid out in growing pains and joint pain. Also mention it if the leg pain comes with a strong urge to move the legs, which now formally excludes the diagnosis and points toward restless legs syndrome instead.

This content is informational and does not replace medical consultation, diagnosis, or treatment. See also leg pain at night in children.