'Growing Pains' in Childhood Linked to Migraine

By Pat Anson, PNN Editor

Did you experience “growing pains” as a child? An unusual ache or throbbing in your legs that occurred late in the day and kept you awake at night?

The Mayo Clinic says there’s no evidence that a growth spell actually causes physical pain, and that any discomfort may be caused by a low pain threshold or even psychological issues.

But a small new study suggests something else may be going on: Brazilian researchers say children who have growing pains are significantly more likely to develop migraines – just as their parents did.  Migraine can be hereditary, and if one or both parents have migraine, there’s a 50-75% chance that their children will also.

“In families of children with growing pains, there is an increased prevalence of other pain syndromes, especially migraine among parents,” wrote lead author Raimundo Pereira Silva-Néto. PhD, a neurology professor at Federal University of Delta do Parnaibal. “Children with migraine have a higher prevalence of growing pains, suggesting a common pathogenesis; therefore, we hypothesized that growing pains in children are a precursor or comorbidity with migraine.”

With parental authorization, Silva-Néto and his colleagues followed 78 children between 5 and 10 years of age, who were born to mothers being treated for migraine at a headache clinic. Their findings were published in the journal Headache.

After five years, about half of the children reported growing pains in their lower limbs. Headaches occurred in 76% of those children, with many meeting the criteria for migraine without aura. By comparison, only 22% of the children who did not have growing pains had headaches.

Lower limb pain was reported most often in the calf muscles (70%), usually lasted more than 30 minutes, and occurred more frequently at night.

That nocturnal connection intrigued the researchers, who noted that previous studies have found that sleepwalking, nightmares, and restless leg syndrome also occur more frequently in children who have migraines.   

“There is no definitive explanation for the nocturnal patterns of growing pains, nor for the overlap with sleep disturbances; however, the authors believe the hypothesis of a common pathogenesis with migraine,” researchers concluded. “Pain in the lower limbs of children and adolescents, commonly referred to as GP (growing pains) by pediatricians and orthopedists, may reflect a precursor/comorbidity with migraine.”

Migraine affects about 39 million people in the United States and is the second leading cause of disability worldwide, according to the American Migraine Foundation. In addition to headache pain, migraine can cause nausea, blurriness or visual disturbances, and sensitivity to light and sound. About one in five teens suffer from migraine.