Headaches in children

This article discusses headaches in children, which is becoming more prevalent as the school year begins.

As the school year approaches and begins, many parents may start to hear their children complain about headaches.

According to Nick DeBlasio, MD, a pediatrician in Cincinnati Children's Hospital Medical Center's Pediatric Primary Care Clinic, about 10% of school-aged children and 15-27% of teens experience them from time to time.

Headaches can be triggered by a number of different things. Here are the most common causes of occasional headaches in children:

Inadequate hydration. Not drinking enough fluids is one of the biggest causes of headaches. This is especially true when the weather gets warmer and kids become more active outside and lose fluid through sweating. If this is the case, the cure might be as simple as having your child drink more water.

Diet. Does your child eat regular meals? Skipping one meal, like breakfast, can trigger a headache. It's also important to make sure that your child is eating a well-balanced diet with lots of fruits and vegetables. Too much caffeine and certain foods can cause a headache as well.

Sleep. Kids in middle and high school typically need at least 10-12 hours of sleep a night. Not sleeping enough at night can cause a headache. And getting less than 10 hours isn't enough to feel well-rested.

Stress. We all experience stress from time to time, and children and teens are no exception. If your child is under a lot of pressure from school, or experiencing big changes at home like a divorce or a big move, a headache can result.

Vision problems. If your child is unable to see what's happening at the front of the classroom, he might be straining his eyes to see far away, which can result in a headache. A vision test can give you a better understanding of whether or not your child's headaches are being caused by vision problems.

Family history. Your child is more likely to have headaches if a parent gets them as well.

If your child has a headache, try giving her water and over-the-counter ibuprofen. Follow the instructions on the package for the appropriate dosage and do not give it to your child more than three times in a week. If it persists for a few days or worsens, call your child's pediatrician.

Fortunately the majority of headaches in children are not a cause for alarm. However, there are a few instances which require a little more investigation. If your child's headaches have become more frequent or severe, if he wakes up in the morning of the middle of the night from it, or if the headache causes vomiting, it's best to have your child evaluated by your pediatrician.

He or she will perform a physical exam and decide if any tests need to be done. Brain MRIs and CT scans are rarely needed. If your pediatrician suspects a migraine, she might refer your child to a neurologist who is familiar with medications to help prevent and treat them.

And if your child or teen is suffering from chronic headaches and migraines, recent research by Cincinnati Children's found that adding cognitive behavioral therapy to treatment of pediatric migraines improves relief.

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Hot weather may play a role in concussions - Even a 2 percent loss in body volume is important!

A study showed that hot weather and dehydration can increase a person's chance of having a concussion.

A loss of just two percent of the body's water volume to dehydration -- a feat easily achieved during prolonged exercise in hot weather -- can lead to a significant reduction in the amount of cerebrospinal (CSF) fluid that a person has. CSF acts as a cushion to protect the brain from hitting against the inside of the skull during jarring movements. For football players, games conducted in hot and humid conditions could present the perfect storm of risk factors to up their chances for a concussion.

Researchers at the University of Windsor investigated whether the incidence of concussion increased along with the temperature. J. Craig Harwood presented the research team's findings in a poster session on Monday, April 28, at the Experimental Biology Meeting. Experimental Biology is an annual meeting comprised of more than 14,000 scientists and exhibitors from six sponsoring societies and multiple guest societies. With a mission to share the newest scientific concepts and research findings shaping current and future clinical advances, the meeting offers an unparalleled opportunity for exchange among scientists from throughout across the United States and the world who represent dozens of scientific areas, from laboratory to translational to clinical research.www.experimentalbiology.org

Harwood et al. compiled data on 420 NCAA FBS game-time concussions that occurred during games played outside over a five year period (2008-2012). They also looked at environmental conditions (temperature, humidity, and wind speed) during those games.

From the authors: "The relationship between hydration status and injury occurrence, such as skeletal muscle cramps, is well known, but more information is needed regarding physiological status and the risk of more severe injury like concussion. We were initially interested in the link between dehydration and concussion frequency/severity, however this type of observation was obviously problematic (e.g., measuring game time hydration status in thousands of athletes prior to head injury). Hydration status was unknown, and factors like helmet function (which is compromised in cold conditions) may hide true differences.

We hypothesized that if a relationship existed, we would be able to observe an increase in concussion frequency during games that took place under extreme conditions. But given the primary playing season (i.e., Fall), very few games were played in environmental extremes. Additionally, the high level of competition likely insured that athletes were well prepared for games in all conditions. In the end, the overall rates of concussions were consistent across game time temperatures, but a link between dehydration and concussion rate may still exist.

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Pediatric migraines may be caused by environment

Different environmental factors, such as sleep deprivation, diet, and school, could play a role in pediatric migraines.

Environmental stressors play a large role in triggering migraines in children, according to Dr. Eric Pearlman.

"Migraine is definitely a pediatric disorder. It peaks in young adulthood, but it definitely occurs in kids," Dr. Pearlman, chair of the department of pediatrics at Mercer University in Savannah, Ga., said at the annual meeting of the American Academy of Pediatrics.

Epidemiologic data suggest that migraine occurs in 10.5% of 10- to 15-year-old children and 3% of 7-year-olds, and that headaches – possibly including migraines – occur in 4% of 3-year-olds. By about 13 years of age, the prevalence of migraines starts reaching adult levels of about 6% in males, and 18% in females.

Environmental factors such as sleep deprivation, dehydration, dietary factors, school stressors, hidden stressors (like peers), and hormonal fluctuations represent triggers that can be particularly pronounced in children, he noted.

With International Classification of Headache Disorders, third edition (ICHD-III) criteria, migraines can be differentiated from acute, acute recurrent, and chronic progressive or chronic nonprogressive headaches if a child has experienced at least five attacks lasting up to 72 hours (whether untreated or unsuccessfully treated), if nausea and/or vomiting or photophobia and phonophobia are present, and if the child has at least two of four characteristics, including unilateral location, pulsating quality, moderate to severe intensity, and a tendency to be aggravated by – or avoid – routine physical activity.

In children, photophobia and phonophobia can be inferred (if they report having to lie down in a dark, quiet room, for example), as many have difficulty describing or understanding these symptoms

Unilateral headaches are rare in children, Dr. Pearlman noted.

If a diagnosis of migraine is established, it is important to make the diagnosis known to the child, and to educate the child about the condition and treatments.

Consider providing handouts and referring to websites (such as theAmerican Headache Society or the National Headache Foundationsites), to help educate patients and to manage their expectations, as they need to understand you cannot cure their migraine, he advised.

Involving both the patient and their parents in decision making can improve compliance with treatment recommendations, he said.

Pharmacologic interventions can include nonspecific short-term therapies, migraine-specific therapies, and preventive treatment.

Nonspecific short-term therapies may include acetaminophen, nonsteroidal anti-inflammatory drugs, or combination drugs. Migraine-specific therapies include ergotamine and dihydroergotamine, and the "triptans."

Seven triptans are available, including two that are approved for use in children; rizitriptan (Maxalt) is approved for children older than age 6 years, and almitriptan (Axert) is approved for those aged 12-17 years.

Maxalt comes in both an oral and orally disintegrating form, and is available as a generic drug. Generic sumitriptan (Imitrex) also is available.

"There are good data for most of the triptans for adolescents aged 12 and older," Dr. Pearlman said.

Rescue medications for those who have an inadequate response to short-term therapy can include a combination of an analgesic like a nonsteroidal and an antiemetic, or an opiate and an antiemetic if the patient used a nonsteroidal initially. Rescue medications may be needed "because nothing is going to work 100% of the time," he said.

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