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Chronic migraine

We know that physical emotional, and sexual abuse in childhood increases the risk of developing chronic pain and migraines later in life. Dutch researchers looked at several other potential predisposing factors. The results of their study were published in the May issue of the journal Pain.

This study was a part of the Dutch Prevention and Incidence of Asthma and Mite Allergy birth cohort study. It included 3,064 children who were evaluated at the ages of 11, 14, 17, and 20. The researchers assessed headache prevalence and incidence in girls and boys and explored associations with early life, environmental, lifestyle, health, and psychosocial factors.

From age 11 to 20 years, the prevalence of headaches increased from 9% to 20% in girls and remained in 6% to 8% range in boys. Eighty-eight percent of the girls and 76% of boys with headaches also reported at least one of the following at age 17: sleeping problems, asthma, hay fever, musculoskeletal complaints, fatigue, low mental health, or worrying. They also found that lower educational achievement, skipping breakfast on two or more days per week, and in boys, exposure to tobacco smoke in infancy, increased the risk of developing headaches. In girls, sleeping problems and musculoskeletal complaints were associated with a higher chance of having headaches. Interestingly, residential greenness reduced the chance of developing headaches.

The risk factors are usually divided into modifiable and non-modifiable. Sex, age, and genetic factors are some of the non-modifiable ones. The factors mentioned in the study, except for sex, are all theoretically modifiable. In practice, however, they are very difficult to fix. Eating breakfast every morning is probably the easiest to achieve for most families. But even that can be difficult for the very poor. Moving to suburbs for greener surroundings, improving educational opportunities, and avoiding second-hand smoke in infancy are even harder to achieve.

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Post-traumatic headaches (PTH) are classified as a distinct category of headaches. There is growing evidence, however, that headaches that develop after a head injury are migraines.

A study just published in Cephalalgia by Dr. Ann Scher, her colleagues at the Uniformed Services University, and other researchers, showed that PTH and migraines are very similar. The only difference they found was that headaches occurring after a head injury tend to be more severe.

They studied 1,094 soldiers with headaches. 198 were classified as having PTH. These headaches were compared to those in the other soldiers. They looked for the presence of 12 migraine features: Unilateral location, photophobia, phonophobia, nausea, exacerbation of headache by routine physical activity, pulsatility, visual aura, sensory aura, pain level, continuous headache, allodynia (sensitivity to touch), and monthly headache days.

Soldiers with post-traumatic headache had a greater endorsement of all 12 headache features compared to the soldiers with non-concussive headaches. The authors concluded that post-traumatic headaches differ from non-concussive headaches only by severity and not by any other symptoms.

Another study published in 2020 by Dr. Håkan Ashina and his Danish colleagues showed similar results. They performed a detailed evaluation of 100 individuals with persistent PTH following a mild traumatic brain injury. They found that 90 of the 100 patients had migraines or migraines as well as tension-type headaches. The rest had only tension-type headaches.

These findings have important treatment implications. These patients should be treated like other patients with chronic migraine. Assigning these patients the diagnosis of chronic migraine allows them access to treatments such as Botox injections and CGRP drugs. Insurance companies will not pay for any of the expensive migraine therapies if a patient carries only the diagnosis of PTH.

Our experience and that of our colleagues suggest that Botox is indeed very effective for PTH.

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This blog has many posts about the role of magnesium in the prevention of migraines and clinical trials of magnesium. Another study was just published by Iranian doctors in The Journal of Headache and Pain.

Unfortunately, like other studies, this one has a major flaw. Magnesium was given to all migraine sufferers, whether they were deficient in magnesium or not. If you are not deficient, taking extra magnesium will not help. For those who are deficient, however, the effect can be dramatic.

Another problem with this and several previous studies is the use of poorly absorbed salts of magnesium. In this case, magnesium oxide.

Patients in this study were divided into three groups. One group was given valproate (200 mg twice a day), the second group, valproate with magnesium oxide (250 mg twice a day), and the third group, magnesium oxide alone (also 250 mg twice a day). There were 82, 70, and 70 patients in each group, respectively.

Patients in the two groups that included valproate did better than those in the group taking magnesium alone. The combination of valproate with magnesium was more effective than valproate alone.

Surprisingly, the authors mention nothing about side effects. Valproate is one of the last drugs I use in migraine patients. It has many potential side effects, including weight gain, hair loss, tremor, nausea, and others. The majority of migraine sufferers are women of childbearing age and up to half of the pregnancies in the US are unplanned. So, another major reason I rarely prescribe this drug is that valproate is contraindicated in pregnancy. It can cause congenital malformations and developmental problems.

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Weight loss in overweight migraine sufferers – including that produced by bariatric surgery – leads to a reduction in the frequency of migraine attacks. In a previous post and in my new book I mentioned the use of metformin, a diabetes drug that helps weight loss, in migraine patients.

A study published in the February 10 issue of The New England Journal of Medicine definitively confirmed that weekly injections of another diabetes drug, semaglutide (Ozempic) can lead to an average of 15% weight loss in obese individuals. Seventy percent of participants lost at least 10% of weight. This was a double-blind, placebo-controlled trial that included 1,961 participants. Individuals in both the placebo and the active group were counseled every four weeks to encourage maintenance of a reduced calory diet and increased physical activity. Semaglutide is very similar to dulaglutide (Trulicity).

Other drugs that are used for weight loss produce an average of 4% to 6% weight loss and tend to have more side effects. Nausea and diarrhea were the most common adverse events with semaglutide. They were typically transient and mild-to-moderate in severity and subsided with time. Only 4.5% of participants on semaglutide stopped taking the drug due to side effects.

Obesity is a risk factor not only for diabetes and increased frequency of migraines but also strokes, idiopathic intracranial hypertension (pseudotumor cerebri), obstructive sleep apnea, hypertension, and others.

This trial should lead to the FDA approval of semaglutide for weight loss in obese individuals without diabetes. Hopefully, the FDA approval will compel insurance companies to pay for it. The out-of-pocket cost of 4 pen-like syringes is $735.

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The headache of low cerebrospinal fluid (CSF) pressure can be very severe. Its main feature is that it gets worse on sitting or standing and improves upon lying down. Sometimes, this change is quick but occasionally the headache slowly gets worse as the day goes on and is mildest or absent upon awakening in the morning.

Low CSF pressure often results from the needle going in too far during an epidural steroid injection for low back pain or epidural anesthesia during delivery or surgery. This results in the spinal fluid leaking into the soft tissues of the back. The loss of fluid causes sagging of the brain which normally floats in a thin layer of CSF. Spinal fluid leaks usually seal on their own but sometimes require a “blood patch”– injecting the patient’s blood into the area of the leak. The injected blood clots and seals the leak.

If a CSF leak happens after a diagnostic spinal tap or an epidural procedure, it is better to have the blood patch sooner rather than later. I recommend doing it if the headache persists for more than a couple of days.

Rarely, a spinal fluid leak occurs spontaneously after straining or without an obvious trigger. This condition is called spontaneous intracranial hypotension (SIH). A review of scientific reports of SIH involving over 2,000 patients by a British physician Dr. Manjit Matharu and his colleagues provides a good description of this condition. Headache was present in 99% of patients. In 2% the headache did not change with the change of position and 1% had no headache but only other symptoms.

The five most common symptoms of SIH besides headaches, were nausea, neck pain or stiffness, tinnitus (ringing in the ears), dizziness, and hearing problems.

The diagnosis can be made by an MRI scan with an intravenous injection of gadolinium, which is a contrast dye. According to Dr. Matharu’s review, however, MRI was normal in 19% of patients. A spinal tap to measure the pressure can be a useful test, although it was normal in one-third of patients. This is explained by the fact that intracranial pressure often fluctuates. In some patients, a spinal tap can make headaches worse. Another test is an MRI of the spine to detect an accumulation of the leaking CSF. This test was helpful only in a little more than half of the patients. A more advanced test done when other tests are negative and a blood patch is ineffective is a digital subtraction myelogram. So even when SIH is suspected – and often it is not – it may be difficult to prove the diagnosis.

In 28% of patients, bed rest and hydration were sufficient to heal the leak. A single or repeated blood patch was effective in 64% of patients. When the site of the leak is not found, most specialists do a blind patch at the lumbar level. A larger volume of blood, 20-30 ml is more effective than smaller volumes. In a small proportion of patients, surgical repair of the leak is necessary and it is done by a neurosurgeon.

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The term postural orthostatic tachycardia means that the heart rate becomes very fast upon standing up. POTS is a disorder of the autonomic nervous system that is associated with abnormal blood flow regulation. Almost all patients with POTS suffer from migraines. POTS can present with a bewildering variety of additional symptoms besides headaches (see below). This is why the diagnosis is often missed. Unfortunately, there are very few effective treatments for POTS. Making the correct diagnosis, nevertheless, is very important. It explains the cause of symptoms that are often dismissed as psychological and in some patients, treatment can lead to a dramatic improvement.

This blog was prompted by a positive study of a drug, ivabradine, to treat POTS that was published by Dr. Pam Taub and her colleagues. Ivabradine (Corlanor) is approved by the FDA to treat heart failure, so its use for POTS is “off-label”. This means that insurance companies are not likely to cover an unapproved use of a drug that costs $500 a month. With additional trials confirming that ivabradine works and with a lot of persuasion by the doctor, insurers might cover it if other treatments fail. Currently, the drugs that are used to treat POTS include beta-blockers, midodrine, fludrocortisone, and others. Increased intake of salt and fluids, exercise, dietary changes, and correction of nutritional deficiencies such as vitamin B12 and magnesium cal also help.

Here is how the Cleveland Clinic website describes POTS:
POTS symptoms can be uncomfortable and frightening experiences. Patients with POTS usually suffer from two or more of the many symptoms listed below. Not all patients with POTS have all these symptoms.
High blood pressure/low blood pressure.
High/low heart rate; racing heart rate.
Chest pain.
Dizziness/lightheadedness especially in standing up, prolonged standing in one position, or long walks.
Fainting or near-fainting.
Exhaustion/fatigue.
Abdominal pain and bloating, nausea.
Temperature deregulation (hot or cold).
Nervous, jittery feeling.
Forgetfulness and trouble focusing (brain fog).
Blurred vision.
Headaches and body pain/aches (may feel flu-like); neck pain.
Insomnia and frequent awakenings from sleep, chest pain and racing heart rate during sleep, excessive sweating.
Shakiness/tremors especially with adrenaline surges.
Discoloration of feet and hands.
Exercise intolerance.
Excessive or lack of sweating.
Diarrhea and/or constipation.

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Cyclic vomiting is considered to be a form of migraine. It is most common in children. Surveys indicate that 2% to 3% of children may be suffering from this condition. These children often develop typical migraines as they get older. Cyclic vomiting can also occur in adults. The main and usually the only symptom is intense vomiting. Vomiting occurs several times an hour with bouts lasting anywhere from an hour to several days. It is different from abdominal migraines which manifest themselves mostly by stomach pains. Nausea and vomiting can also occur, but abdominal pain is the predominant symptom. Some children progress from cyclic vomiting to abdominal migraines and then, to typical migraine headaches. Many children and adults have a family history of migraines.

To diagnose cyclic vomiting we need to consider and rule out all other possible causes of vomiting. These include gastrointestinal disorders, genetic conditions, brain tumors, and infections. An endoscopy, abdominal ultrasound, MRI scan of the brain, and blood tests are some of the usual tests.

Physical and emotional stress can trigger an attack of cyclic vomiting. Treatment is very similar to the treatment of migraines. It begins with regular sleep, exercise, relaxation training or meditation, magnesium and COq10 supplements. If attacks are frequent, preventive medications such as tricyclic antidepressants and epilepsy drugs can be useful. For acute attacks, sumatriptan nasal spray (Imitrex NS, Tosymra) and zolmitriptan nasal spray (Zomig NS) or sumatriptan injections can be effective. Antinausea drugs such as ondansetron (Zofran), metoclopramide (Reglan) and aprepitant (Emend) can be given by injection. Prochlorperazine (Compazine) and promethazine (Phenergan) are available in rectal suppositories.

This post was prompted by a review of this topic in the last issue of the journal Headache by Dr. Kovacic and Li of the Medical College of Wisconsin. It is an open-access article – you can read the entire article for free.

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Magnesium supplementation for the prevention of migraine headaches has been gaining wider acceptance. Dozens of studies, including several of our own, have shown that migraine sufferers often have a magnesium deficiency. Studies have also shown that taking an oral supplement or getting an intravenous infusion of magnesium, relieves migraines.

The causes of magnesium deficiency include genetic factors, poor absorption, stress, alcohol, and low dietary intake of foods rich in magnesium. A study just published in the journal Headache looked at the dietary intake of magnesium, including supplements, in those with migraines compared to people without migraines.

The study included 3626 participants, 20- to 50-years old. A quarter of these people suffered from migraines. People who consumed the recommended daily amount (RDA) of magnesium had a lower risk of migraine. This risk was the highest in those who were in the bottom quarter of magnesium consumption.

This was a correlational study, meaning that it does not prove that taking magnesium prevents migraines. However, common sense and our clinical experience, combined with all the previously published studies, strongly support taking magnesium to prevent migraines.

There are many other benefits of magnesium that I’ve written about in this blog – just enter “magnesium” into the search box and you will find a few dozen posts.

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Transient global amnesia (TGA) is a very frightening condition. Suddenly, you feel confused and disoriented. You don’t know where you are, what time it is, what you are supposed to be doing. You can’t remember what you were just told and keep asking, what time it is, where you are, what is going on. Fortunately, it is a benign condition and tends to last four to six hours.

A study published last year by the Mayo Clinic researchers analyzed records of over one thousand patients who experienced TGA. The majority (86%) had a single episode and 14% had more than one. The mean age was 65. History of migraines was present in 20% of people with a single episode and in 36% in those with multiple attacks. Family history of migraines was found in 19% and 31% respectively.

TGA is a benign disorder. MRI scan and EEG were abnormal only in a small number of patients. The authors speculate that a similar mechanism may be responsible for TGA and migraines. This may apply to those with a personal or family history of migraines, but the majority of patients did not have either. It is not clear why TGA tends to occur in older people and why a family history of TGA is uncommon.

A review of several prior studies that looked at the incidence of TGA in large groups of migraine patients was published last month. This meta-analysis showed that people who suffer from migraines are 2.5 times more likely to have an episode of TGA.

A study from Taiwan showed that patients with an attack of TGA are more likely to develop dementia, but mostly in those who were older and suffered from diabetes. People with a history of TGA are not at an increased risk of a stroke.

Despite the low yield, most people who experience a TGA undergo an MRI scan for a possible tumor or a stroke. An EEG, or brain wave test is done because some types of epileptic seizures can present with confusion.

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My new book, The End of Migraines: 150 Ways to Stop Your Pain, was just published by Amazon. It is also available on Google Play and Kobo.
I am very grateful to all my colleagues who took the time to read the book and to provide advance praise for it.
This is a self-published book. This allows me to update it regularly and to set a very affordable price – the e-book version is only $3.95 and the paperback is $14.95. The e-book version has the advantage of having many hyperlinks to original articles and other resources.
If you read it, please write a brief review on Amazon or Google and spread the word about it.

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Persistent post-traumatic headache (PTH), paradoxically, is more common after a mild traumatic brain injury (TBI) than after a severe one.

In a recently published study, researchers in Indiana examined possible factors that may predispose people to a persistent headache after a mild TBI. They recruited 44 adult patients with mild TBI in an emergency department of a trauma center.

Participants completed a variety of psychological questionnaires and underwent tests to measure innate pain control mechanisms. Participants were classified into persistent PTH and nonpersistent PTH groups based on the 4-month data.

The results showed that patients with mild TBI who developed persistent PTH had significantly reduced pain inhibitory capacity, higher rates of depression and pain catastrophizing following injury compared to those who did not develop persistent PTH. They also found that headache pain intensity at 1–2 weeks and pain inhibitory capacity at 1–2 weeks predicted persistent PTH at 4 months after the injury.

The authors concluded that persistent PTH is more likely in people with impaired endogenous pain modulatory function and psychological processes such as depression and catastrophizing.

Catastrophizing is defined as having irrational thoughts about pain being uncontrollable, leading to disability, loss of a job, partner, ruined life, etc. Catastrophizing can be measured by questions such as “I feel it is never going to get better”, “I can’t stand it anymore”, and others.

Catastrophizing has been shown to predict the degree of pain and disability in chronic low back pain and other painful conditions.

The good news is that cognitive-behavioral therapy, multimodal treatment, and acceptance and commitment therapy can reduce catastrophizing.

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Researchers in Cincinnati, OH led by Dr. Andrew Hershey reviewed information about the diagnosis, headache features, medication overuse, functional disability in a group of 1,170 children and adolescents with continuous headaches. They compared patients given the diagnosis of chronic migraine with those who were diagnosed as having new daily persistent headache.

The mean age was 14 and 79% of the group were girls. The authors reported that “The overwhelming majority of these youth had headaches with migrainous features, regardless of their clinical diagnosis. Most youth with continuous headache experienced severe migraine-related functional disability, regardless of diagnostic subgroup.”

They concluded that “Overall, youth with continuous chronic migraine and new daily persistent headache did not have clinically meaningful differences in headache features and associated disability. Findings suggest that chronic migraine and new daily persistent headache may be variants of the same underlying disease.”

Here is my take on NDPH adapted from the soon-to-be-released book, The End of Migraine: 150 Ways to Stop Your Pain:

New daily persistent headache (NDPH) is one of the dozens of types of headaches listed in the classification of headaches. This particular listing causes more harm than good. NDPH is defined by the single fact that the headache begins on a certain day and persists without a break. The classification says that NDPH may have features suggestive of either migraine or tension-type headache.

There are no parallels to NDPH in medicine. There is no new daily persistent asthma, or new daily persistent colitis, or any other “new daily” disease.

There does not appear to be any justification for having NDPH as a distinct condition. It does not have a typical clinical presentation and it has not led to any research or treatment. When you search for this condition on the internet, you will not find any effective treatment for it. The suffering of many patients is magnified by the loss of hope, worsening depression, and flagging will to live.

Most importantly, some patients with NDPH do respond to treatment. According to anecdotal reports and in my experience, Botox injections, intravenous magnesium, preventive drugs for migraines, and other treatments can be effective.

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