Why Migraines Are Often Undiagnosed: Hidden Signs 2026

Why migraines are often undiagnosed is a critical question for many patients and caregivers. In clinical practice, migraine is frequently missed in individuals with severe intellectual disabilities or autism who are non-verbal and cannot report head pain. Instead, behaviors like head-banging may be misinterpreted, leading to harmful consequences.

The Hidden Burden of Undiagnosed Migraine

Migraine is one of the most common neurological disorders, yet it remains underdiagnosed in vulnerable populations. Diagnostic overshadowing occurs when symptoms are attributed to a person's existing condition, such as autism or intellectual disability, rather than a treatable medical issue like migraine. This can delay effective pain relief and increase suffering.

Research from the 1990s (McDougle et al.) showed that low tryptophan levels in people with severe autism increased stereotypic behaviors, including banging. This suggests that dietary factors, such as cheese cravings, may be linked to migraine and behavioral changes.

Why Non-Verbal Individuals Are at Higher Risk

Non-verbal individuals cannot describe their headache, so caregivers and clinicians must rely on observable signs. Common indicators include increased agitation, self-injurious behavior, changes in sleep, or sensitivity to light and sound. Without proper assessment, these signs are often dismissed as behavioral issues.

A study in Headache found that migraine prevalence in intellectually disabled populations is similar to the general population, yet diagnosis rates are significantly lower. This gap highlights the need for better screening tools and clinician education.

Data Table: Migraine Diagnosis Rates by Population

This table illustrates the stark disparity in diagnosis rates, emphasizing the urgent need for increased awareness and proactive screening.

Key Takeaways for Patients and Caregivers

• Recognize non-verbal cues like head-banging, rocking, or sudden behavioral changes.
• Track diet and triggers – cheese, chocolate, and caffeine may influence migraine.
• Advocate for thorough medical evaluation even when a patient has a pre-existing diagnosis.
• Consider a headache diary to identify patterns and share with healthcare providers.
• Seek specialist input from neurologists or headache clinics experienced with neurodiverse patients.

Steps to Improve Migraine Diagnosis

Clinicians should adopt a biopsychosocial approach that considers behavioral expressions of pain. Standardized pain assessment tools for non-verbal patients, such as the Pain Assessment in Advanced Dementia Scale, can be adapted for this population.

Additionally, educating caregivers about the link between migraine and behavioral symptoms can lead to earlier recognition and treatment. In one case, a patient with autism who engaged in severe head-banging was found to have chronic migraine; after appropriate preventive therapy, the behavior reduced dramatically.

FAQ

Undiagnosed migraine is a silent epidemic that affects the most vulnerable. By increasing awareness, improving screening, and advocating for compassionate care, we can reduce suffering and improve quality of life.