Headaches are a common comorbidity among a variety of psychiatric diagnoses.
TALES FROM THE CLINIC
In this installment of Tales From the Clinic: The Art of Psychiatry, we delve into a very common neuropsychiatry comorbidity: headaches. Headaches are a common comorbidity among a variety of psychiatric diagnoses. This neuropsychiatric condition can be challenging to manage due to a strong overlap with somatization.
“Mr Wright” is a 37-year-old man with no medical comorbidities who has been in the United States for more than 10 years. Mr Wright presented to primary care with a 4-month history of headaches that were unresponsive to over-the-counter non-steroidal anti-inflammatory drugs (NSAIDs). He is started on amitriptyline 25 mg at bedtime daily and is referred to psychiatry for “anxiety” without any further notes on symptoms of anxiety. The patient is worried he will be labeled “crazy” and is upset that his suffering is not being taken seriously.
He appears to be in good physical health with good grooming, although he is somewhat reluctant during the psychiatric interview. He reports that he has been living with his wife and child, and he works at a restaurant. He has teenage kids who do not live with him, but reportedly has a good relationship with them.
When describing his headaches, Mr Wright relays that they persist all day long and encompass areas around his bilateral temples and occipital area, although the pain may migrate between these areas. He has tried to lay down to rest, but the relief in pain is temporary. He is unable to focus on driving and has missed several workdays because he did not feel like he could pay attention while driving. He stretches his neck in a variety of different angles during our interaction to help relieve the pain, along with some excess eye blinking that he seems unaware of. He denies a premonitory sensation occurring prior to his movements.
After repeated queries into his stressors around the time his headaches started, Mr Wright is able to verbalize an incident that occurred a week before their onset: He was accommodating his sister at his home after an interpersonal conflict with her husband. The brother-in-law had held him at gunpoint outside his home. He had run inside to safety, and the brother-in-law had eventually left. His sister has since left, and the patient feels that the turmoil of an abusive relationship in his sister’s life is persistent and acceptable to his sister and the rest of the family. He recalls a similar event over 20 years ago when he was chased by a different family member in his home country. At that time, Mr Wright also felt his life was in danger and had to run to safety, and since then, he has been an anxious person in general. He has never received any mental health treatment (including psychotherapy) before.
He denies typical symptoms of posttraumatic stress disorder (PTSD) including nightmares, flashbacks, and avoidance of increased arousal.
A chart review shows that Mr Wright was seen in the ER twice since he met with his primary care provider. On 1 occasion, he had acute chest pain; negative EKG and cardiac enzymes led to a discharge. On the second occasion, he was evaluated for unprotected sexual contact with an unknown individual. Mr Wright had chosen not to mention any of these instances of his interaction with the medical system, and the psychiatrist chose not to discuss them either.
He was started on amitriptyline 25 mg by his primary care physician 2 weeks ago, and he has been using it as needed on nights he is unable to sleep. He finds it useful, but he is unable to get relief from headaches. He is unable to verbalize any correlation between a life-threatening event and the onset of his headaches.
At the conclusion of the visit, patient and physician agree to continue amitriptyline, but agree that the patient should take it more regularly for best therapeutic results.
As per a systematic review of a global burden of disease across the United States, in 2017, the 5 highest incidence rates of neurological diseases included migraines and tension type headaches.1 Migraines have consistently been among the top 3 neurological diseases in terms of disability adjusted life years.2 As a testament to how frequently psychiatrists and neurologists see patients with headaches and psychiatric diagnosis, in 2019, the most frequent psychiatric comorbidities in individuals with primary headaches in the United States were anxiety and depression, followed by posttraumatic/stressor and trauma-related stress disorder. These comorbidities are found in 25%, 23%, and 15% of the general population, respectively.3
It is inevitable then that one is likely to come across patients with both primary and secondary headaches in psychiatric practice. Recognizing headaches can be a powerful tool in evaluating the quality of life of our patients. Headaches can be triggering and perpetuating factors for psychiatric conditions in addition to being an important consideration in identifying the best pharmacological options for treatment.
In primary headaches such as migraine and tension headaches, there is no source for nociceptive activity such as a hemorrhage or inflammation. Many theories have tried to explain connections between distress and primary headaches. Existing studies on connections among distress and primary headaches clearly show that the most important triggering events for primary headaches are distress and sleep issues.4 Stress has also been linked with the transformation of episodic migraines to chronic migraines that carry a greater burden of disease.5 Interestingly, repeated exposure to trauma, even without a formal PTSD diagnosis, is prominent in chronic migraine headaches as compared to healthy adults without migraines.
Biopsychosocial factors are believed to be involved in headache perception. Transactional models propose that the mismatch between threat perception and capability to deal with the threat can be applied to the subjective sense of pain in migraines, as well as to any other pain syndrome.6 Among personality traits, locus of control being perceived as internal versus external predicts better headache outcomes.
During the current COVID-19 pandemic, the role of sudden change in psychosocial environment due to shutdowns among those with preexisting migraines has been investigated. Contrary to the impression that headaches would worsen, at least 1 study has recorded improvement. The study documents reduction in migraine intensity and frequency in adolescents during COVID-19 shut down in Italy in 2020.7 It is reasonable to speculate the reduction in academic and social pressures as being helpful in this improvement and underscore the role of psychosocial intervention on patients with migraines. Moreover, it would be interesting to see if there is an uptick in migraine presentation to neurologists and psychiatrists due to the chronic stress induced by the pandemic, over and above migraine in individuals caused by neuropsychiatric effects of COVID-19 infection itself.
Neuropsychiatry of Headache
Migraine headaches have a bidirectional relationship with a spectrum of psychiatric illnesses, the strongest correlation being with depression, anxiety, and bipolar disorder. There is evidence of shared genetic predisposition, as well as functional and structural alterations in pain-modulating brain areas, including the amygdala, anterior cingulate cortex, and periaqueductal gray in both migraine and affective disorders. Moreover, they share similar abnormalities in the HPA axis as well as common mechanisms of action of treatment modalities.
The concept of central sensitization is often used to explain pain-related conditions, including migraine. Patients with chronic migraines (as compared to episodic migraines) have more somatic complaints. The role of pain sensitization in episodic migraines has also been investigated in episodic migraines. A recent study suggested that slowly repeated evoked pain sensitization could in fact be useful as a clinical predictor for episodic migraines.8
Serotonin, norepinephrine, and the GABAergic system have all been implicated in the etiology of psychiatric as well as primary headaches at the level of neurotransmitters. As such, the evidence for using serotonin and norepinephrine reuptake inhibitors (SNRIs) and tricyclic antidepressants (TCAs) that target these receptors for preventative treatment for migraines remains strong.
Pearls in Management
Managing psychiatric symptoms in patients presenting for treatment with headaches may present a unique advantage in overcoming barriers to talking about optimizing mental health. When establishing goals for treatment, it may be useful to educate the patient about the benefit of SNRIs and TCAs in managing headaches as well as mood and anxiety disorders. This may help patients verbalize their mental health needs in the face of stigma. At times, presenting an SNRI or TCA as a headache medicine only may help with adherence to treatment in patients who have difficulty expressing their distress.
One of the many challenging difficulties in managing headaches is that initiating SNRIs or TCAs for headache management can itself carry a risk for inducing headaches. A careful consideration of the timeline for medication-induced headache may aid in separating the superimposed symptoms. Clinicians may benefit from considering medication withdrawal as a reason for headache exacerbation when treating psychiatric patients with comorbid headaches and a history of noncompliance. Venlafaxine is notable in this regard for its withdrawal syndrome.
Several studies have been unable to establish the benefit of using selective serotonin reuptake inhibitors (SSRIs) in preventing migraine relapses. Among the most studied SSRIs is fluoxetine, which, to date, has conflicting evidence for its use in primary headaches.9 Other clinical trials of sertraline and citalopram did not show benefit over TCA or placebo. Hence, when a patient with previously established treatment with SSRI is placed on TCAs for headaches, one has to carefully weigh the risks and benefits of switching to monotherapy with TCA or continuing with both medications. If the patient is reporting clinical benefit, they could be managed with low doses of both medication categories while monitoring carefully for adverse effects. Patients can be educated regarding early symptoms of serotonin syndrome when managed in the outpatient setting.
Additionally, many clinicians are concerned about the possibility of inducing serotonin syndrome in patients using antidepressants and are prescribed triptans for aborting episodes of migraines. While there was a Blackbox warning for this interaction, an electronic health record-based study in 2018 did not find any correlation of serotonin syndrome with co-use of SSRIs and SNRIs and triptans.10
In patients with medication overuse headaches, the prevalence of psychiatric comorbidities is even higher.11 Some point to the similarities between compulsive medication intake for episodes of migraine and obsessive-compulsive disorder. As such, adding behavioral interventions for this subset of patients may be highly impactful in improving headache outcomes.
It may be prudent for neurologists to prescribe psychotherapy regularly for managing patients with chronic migraines. Behavioral interventions and forecasting models, including stress variables, seem to be useful in managing migraine. Behavioral treatments with evidence for migraine prevention include stress management, relaxation therapy, cognitive behavioral therapy, biofeedback, mindfulness-based therapies, and acceptance and commitment therapy. Some studies point out that although headache frequency or intensity improves, there is no change in physiological markers of headaches such as muscle tension. In a landmark study of electromyographic biofeedback training, participants viewed their headaches as having a more internal locus of control and themselves as more self-efficacious (ie, as capable of influencing their headaches) following treatment.12
Finally, when addressing this complex patient population, it is essential to avoid labeling and stigmatization. Patients are usually concerned about physical complaints being dismissed and being told “the symptoms are in your head.” Establishing careful therapeutic rapport goes a long way in open discussions of treatment options and paving the way to productive illness management.
Dr Shamim is assistant professor at Baylor College of Medicine, Menninger Department of psychiatry. She specializes in cooccurring psychiatric and neurological disorders.
1. GBD 2017 US Neurological Disorders Collaborators; Feigin VL, Vos T, Alahdab F, et al. Burden of neurological disorders across the US from 1990-2017: a global burden of disease study. JAMA Neurol. 2021;78(2):165-176.
2. GBD 2019 Diseases and Injuries Collaborators. Global burden of 369 diseases and injuries in 204 countries and territories, 1990-2019: a systematic analysis for the Global Burden of Disease Study 2019. Lancet. 2020;396(10258):1204-1222.
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9. Silberstein SD, Holland S, Freitag F, et al; Quality Standards Subcommittee of the American Academy of Neurology and the American Headache Society. Evidence-based guideline update: pharmacologic treatment for episodic migraine prevention in adults: report of the Quality Standards Subcommittee of the American Academy of Neurology and the American Headache Society. Neurology. 2012;78(17):1337-1345.
10. Orlova Y, Rizzoli P, Loder E. Association of coprescription of triptan antimigraine drugs and selective serotonin reuptake inhibitor or selective norepinephrine reuptake inhibitor antidepressants with serotonin syndrome. JAMA Neurol. 2018;75(5):566-572.
11. Kristoffersen ES, Straand J, Russell MB, Lundqvist C. Disability, anxiety and depression in patients with medication-overuse headache in primary care - the BIMOH study. Eur J Neurol. 2016;23(Suppl 1):28-35.
12. Holroyd KA, Penzien DB, Hursey KG, et al. Change mechanisms in EMG biofeedback training: cognitive changes underlying improvements in tension headache. J Consult Clin Psychol. 1984;52:1039-1053.