Why Do Kids Get Headaches? Causes and Triggers

Childhood headaches are far more common than most parents realize, and the causes range from skipped meals and poor sleep to inherited brain chemistry and hormonal shifts during puberty. A large meta-analysis found that roughly 62% of children and adolescents experience primary headaches, with tension-type headache affecting about 17% and migraine about 11%.¹ Understanding what drives these headaches, and which triggers a particular child is sensitive to, is the first step toward fewer painful days.

The Two Main Types of Headache in Children

Most headaches in kids fall into one of two categories. Tension-type headache is the more common one, producing a dull, pressing sensation on both sides of the head. It tends to come and go with stress, fatigue, or muscle tightness in the neck and shoulders. Research shows that children with tension-type headache often have muscles that are harder and more tender than those of headache-free kids, though whether that tightness is a cause or a consequence of the pain remains unclear.²

Migraine, affecting roughly one in ten children overall, is a different animal. It tends to be more intense, often one-sided and throbbing, and frequently comes with nausea, sensitivity to light and noise, or visual disturbances called aura. In kids, migraine attacks can be shorter and harder to pin down than in adults. Young children in particular may have attacks lasting under an hour, which can make getting a clear diagnosis tricky.³ The underlying biology involves a signaling molecule called CGRP, which is found at higher levels in children and teens during migraine attacks, and at especially high levels during the aura phase.⁴

Sleep, Stress, and the Triggers Kids Report Most

When researchers ask children what seems to set off their headaches, poor sleep consistently ranks at or near the top. In one study of children with and without migraine, “a bad sleep” was the single most commonly reported trigger, identified by about a third of participants.⁵ That includes both too little sleep and disrupted sleep, not necessarily fewer total hours in bed. Children with migraine also scored higher on scales measuring sleep-related problems and daytime sleepiness than headache-free peers.

Stress is the other heavy hitter. In a large study of nearly 1,500 young migraineurs, stress was one of the most frequently named triggers, reported by about a quarter of those who could identify a trigger, alongside loud noise and bright light.⁶ That same study found environmental factors as a category accounted for 75% of all reported triggers. Importantly, most children in the study identified just one trigger rather than a long list, which means a single change in routine or environment can be enough to spark an attack.

The stress-headache connection runs deep. Research on urban early adolescents found that anxiety partially explained the link between psychosocial stressors and headache, and that the relationship goes both ways: kids who had more headaches at the start of the study reported increased anxiety and victimization six months later.⁷ During the COVID-19 pandemic, over half of pediatric headache patients reported worsened anxiety, and close to half reported worsened mood, both of which coincided with more headache burden.⁸ So for many children, emotional wellbeing and headache frequency are tightly intertwined.

Food and Drink Triggers

Dietary triggers get a lot of attention from parents, and the evidence supports at least some of the usual suspects. Classic food triggers in pediatric migraine include chocolate, cheese, citrus fruits, processed meats containing nitrites, monosodium glutamate (MSG), and caffeine withdrawal.⁹ These foods contain naturally occurring compounds that can affect blood vessel tone or directly activate pain-signaling pathways in the brain.

When researchers tested dietary elimination in children with chronic headaches, caffeine turned out to be the most commonly implicated trigger, followed by MSG and cocoa.¹⁰ The caffeine finding is worth flagging because many parents don’t realize how much caffeine their child consumes through soft drinks, iced teas, and energy drinks. A child who drinks caffeinated beverages regularly and then skips a day, say over a weekend or holiday, can get a withdrawal headache that feels like a bad migraine.

Not drinking enough water also shows up as a trigger. Inadequate fluid intake was reported by about one in five children who could identify their migraine triggers.⁶ Dehydration is easy to overlook because kids, especially younger ones, often don’t recognize thirst or simply forget to drink during a busy school day.

Screens, Weather, and Other Environmental Triggers

Screen time is a concern parents frequently raise, and research does support the link. Evidence from studies of school-age children suggests that time spent on electronic screens contributes to headache complaints during early adolescence, and some researchers recommend evaluating screen habits in any child presenting with primary headache before starting medication.¹¹ The mechanism likely involves a combination of prolonged visual focus, reduced blinking, poor posture, disrupted sleep when screens are used at night, and the light exposure itself.

Weather is more of a mixed bag. Many children (and their parents) swear that weather changes bring on headaches. When researchers used electronic diaries to track real-time weather alongside headache onset, humidity and precipitation stood out as genuine predictors: children had nearly a threefold increase in headache probability during periods of rain or elevated humidity. Interestingly, changes in temperature, barometric pressure, and sunlight did not independently predict headache in the same study.¹² That challenges the common belief that barometric pressure swings are a major headache driver in kids, though individual sensitivity certainly varies.

Puberty and Hormonal Shifts

A striking pattern emerges around puberty. Before puberty, boys and girls get headaches at roughly similar rates. After puberty, girls pull ahead dramatically. In one Austrian sample, the one-year headache prevalence was 82% in girls compared to 68% in boys, and the gap widened with age.¹³

Fluctuating estrogen levels are the primary driver of this shift. About 53% of adolescent girls report headaches at the onset of their period, pointing to a hormonal trigger tied to the menstrual cycle.¹⁴ Research also shows that headache rates in girls climb linearly with gynecological age, meaning the longer a girl has been menstruating, the more likely she is to have frequent headaches. Menstrual headache and period pain tend to travel together, suggesting shared underlying pathways.¹⁵

Genetics and Family History

If you get migraines, there is a good chance your child will too. A family history of migraine is one of the most consistent findings in pediatric headache research. A scoping review that pulled together all available studies on the inheritance of primary headache in children found that every single included study reported familial clustering or heritability.¹⁶ That does not mean a specific “headache gene” passes neatly from parent to child. Ordinary migraine is polygenic, meaning many genes each contribute a small amount of susceptibility.¹⁷

Rare subtypes are an exception. Familial hemiplegic migraine, a dramatic form that causes temporary weakness on one side of the body during attacks, has been traced to specific gene mutations involving ion channels in the brain. In a pediatric study of this subtype, most patients carried mutations in one of two genes governing calcium or sodium-potassium channels.¹⁸ For everyday migraine, though, genetics sets the stage and triggers pull the curtain.

When a Headache Signals Something Else

The vast majority of childhood headaches are primary, meaning they are the condition itself, not a symptom of another disease. But secondary headaches do occur. In children who show up to the emergency department with an acute headache, the most common underlying cause is a plain respiratory infection with fever, accounting for about 57% of cases. Viral upper respiratory infections, sinus infections, and strep throat together make up the bulk of that number.¹⁹ A sick child with a headache is rarely a mystery. What worries doctors more are headaches that don’t fit a benign pattern.

Certain warning signs prompt clinicians to look deeper. A study of pediatric emergency department visits found that abnormal neurological exam findings, extreme pain intensity, vomiting, and symptoms that change with body position were independently associated with the decision to perform brain imaging.²⁰ Separately, children with secondary headaches were significantly more likely than those with primary headaches to have abnormal neurological signs, headaches brought on by straining or exercise, headaches with vomiting, and headache onset before age six.²¹ A headache that wakes a child from sleep, gets progressively worse over weeks, or comes with any new neurological symptom warrants a medical evaluation sooner rather than later.

Medication Overuse Headache

Here is an irony that catches many families off guard: the very pain relievers used to treat headaches can cause them. When a child takes over-the-counter painkillers too frequently, the brain can adapt in ways that lower the headache threshold, creating a cycle of daily or near-daily pain called medication overuse headache. In a study of about 1,000 children treated for headaches, roughly 2.6% met criteria for this condition. The overuse group was older on average, predominantly female, and had been dealing with headaches for longer, often more than two years. The most commonly overused medications were acetaminophen and nonsteroidal anti-inflammatory drugs.²²

The good news is that stopping the overused medication usually helps. In a small study tracking pediatric patients through a supervised withdrawal period, about two-thirds reported complete resolution of their headache to a pain level of zero within an average of eight days after discontinuation, and overall pain scores dropped from about 4.7 out of 10 at the start to 3.1 by the end of the observation period.²³ A general rule of thumb shared by pediatric neurologists is to limit acute pain medication use to no more than two or three days per week to avoid this cycle.

The Impact on School and Daily Life

Childhood headaches are not just a medical issue; they disrupt the whole fabric of a kid’s daily routine. A recent case-control study compared children seen at a headache clinic with headache-free peers and found stark differences. Over a four-week period, headache patients missed about 1.8 school days compared to 0.3 for controls, left school early 1.2 days versus 0.3, and missed other activities on 4.4 days versus 0.7. Parents of headache patients also lost more workdays.²⁴ Over a school year, that level of absence adds up to weeks of lost instruction and social time, which can snowball into academic struggles and social isolation.

Abdominal Migraine and Other Unusual Variants

Some children get migraines without much head pain at all. Abdominal migraine is a recognized pediatric condition in which the child experiences episodes of moderate to severe belly pain, often with nausea and pallor, that look nothing like a typical headache. These episodes are considered precursors to classic migraine that may appear later in life.²⁵ Other pediatric migraine equivalents include cyclic vomiting syndrome and benign paroxysmal vertigo of childhood. If your child has unexplained recurrent belly pain or episodic vomiting, and there is a family history of migraine, it is worth raising the possibility with their doctor. These conditions often respond to the same lifestyle management and preventive strategies used for head-centered migraine.

Behavioral Approaches to Prevention

Medication is not the only, or even the first, line of defense for many pediatric headache patients. Cognitive behavioral therapy has a track record in pediatric headache going back decades. Trials and meta-analyses show that CBT reduces headache frequency and the disability that goes with it, with almost no negative side effects. Biofeedback, which teaches children to consciously influence body responses like heart rate and muscle tension through visual feedback, is also supported as an effective component of treatment.²⁶

The combination of CBT, biofeedback, and relaxation training appears to reduce both the number of migraine attacks and the disability they cause compared to education alone, according to a recent meta-analysis of 13 pediatric trials.²⁷ Neuroimaging research has begun to show why this works: after a course of CBT, young migraine patients showed changes in brain connectivity in regions involved in pain processing and emotional regulation, alongside a measurable drop in headache frequency from about 15 to 10 headaches per month.²⁸ In practical terms, this means that teaching a child coping skills, relaxation techniques, and strategies for managing stress can physically change how their brain responds to headache triggers.

Diagnosing Headaches in Very Young Children

One of the trickier problems in pediatric headache medicine involves children under six. Toddlers and preschoolers cannot describe their pain in the way older kids can, and their attacks often do not follow the classic patterns that diagnostic criteria were built around. Attacks in young children tend to be short, sometimes well under an hour, and the typical migraine features like nausea or light sensitivity may not be reported simply because the child lacks the vocabulary to identify them.³ For parents with young children who seem to have recurring pain episodes, keeping a simple diary of when episodes happen, what the child was doing beforehand, and how long they last can give a clinician far more to work with than a single office visit. Family history is especially informative in this age group: the number of first-degree relatives with migraine was positively correlated with a migraine diagnosis in young children in at least one study.