Neurodivergent Bodies: Fibromyalgia, Autism, ADHD, and the Science of Chronic Pain

Research into chronic pain and fatigue is uncovering associations with neurodevelopmental differences, raising clinical questions about sensory processing, connective tissue, and healthcare access.

In a case-control study published online in February 2026, researchers examined whether people experiencing chronic pain or chronic fatigue were more likely to meet screening thresholds for autism or attention-deficit/hyperactivity disorder (ADHD). The study included 83 adults in the chronic pain/fatigue group and 91 nonclinical comparison participants. Adjusted odds of screening positive were substantially higher in the clinical group: 14.3 for likely autism and 12.9 for likely ADHD (Quadt et al., 2026b).

The sample included people with conditions such as fibromyalgia and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). The findings therefore apply to the combined chronic pain/fatigue group, not to fibromyalgia alone. Questionnaires measured likely neurodevelopmental traits; they did not establish new clinical diagnoses. The results identify a potentially important association that requires research in larger, clinically assessed populations.

Fibromyalgia provides one starting point for considering how physical illness and neurodevelopmental differences can affect the same person.

Understanding Fibromyalgia

Fibromyalgia is characterized by widespread persistent pain, often accompanied by fatigue, sleep disruption, and cognitive difficulty. The National Institute of Arthritis and Musculoskeletal and Skin Diseases describes altered processing of pain signals as an important feature of the condition (NIAMS, n.d.).

Pain can become more intense in response to ordinarily painful stimulation, a phenomenon called hyperalgesia. Allodynia describes pain in response to stimulation that would not usually hurt, such as light pressure. Such responses can interfere with daily activities despite the absence of a visible injury. Routine scans or bloodwork do not provide a single confirmatory test for fibromyalgia. Clinicians assess symptom history and functional impact while evaluating relevant alternative or coexisting conditions.

Cognitive symptoms sometimes called fibro fog include difficulty concentrating and retrieving words. Sleep disruption can compound fatigue. When ADHD is also present, attention and executive functioning difficulties can overlap with those associated with chronic illness. Clinicians need to consider the course and context of symptoms before attributing every cognitive complaint to an existing diagnosis.

Reading the 2026 Findings Correctly

Quadt and colleagues (2026b) used validated screening instruments for autism, ADHD, and joint hypermobility. Participants reporting chronic pain or fatigue had adjusted odds ratios of 14.3 for likely autism, 95% CI [6.5, 31.5], and 12.9 for likely ADHD, 95% CI [5.0, 26.7].

Odds ratios compare the odds of an outcome across groups. They cannot be translated into population prevalence or treated as the lifetime risk of developing fibromyalgia. The observational design also prevents conclusions about what caused the associations.

The investigators reported statistical mediation involving joint hypermobility, a characteristic of connective tissue variation. Mediation analysis describes a pattern in the collected data; cross-sectional findings cannot establish a biological sequence or demonstrate that hypermobility causes either neurodevelopmental traits or chronic pain.

The study nevertheless identifies worthwhile clinical research questions. Neurodevelopmental screening could improve access to relevant support in some chronic pain settings, particularly where communication and sensory needs have previously gone unrecognized.

Sensory Experiences and Chronic Pain

Autistic people differ in how they perceive touch, sound, movement, temperature, and internal bodily signals. Some experience painful or uncomfortable tactile stimulation intensely. Others have difficulty identifying or describing internal sensations. These patterns can vary within one person depending on sensory domain and circumstances.

Fibromyalgia-related allodynia introduces an additional source of discomfort. Light pressure from clothing or an examination can be painful for someone with fibromyalgia, while surrounding noise or lighting presents separate accessibility demands for an autistic patient.

The mechanisms underlying autistic sensory processing and fibromyalgia pain amplification have not been established as identical. Careful assessment should identify the individual’s physical symptoms and sensory needs without assuming a shared explanation.

Direct evidence about autistic pain experiences remains limited. Garriga-Cazorla and colleagues (2025) reviewed 26 studies concerning chronic pain in autistic people. Headaches and abdominal pain were frequently studied. Pain assessment often relied on parents or clinicians, and only one included study used self-report measures. A substantial portion of autistic people’s own descriptions of pain is therefore missing from the research literature.

A numerical rating scale might not capture the full experience of a person who has difficulty locating pain, distinguishing physical sensations, or speaking comfortably during an appointment. Written symptom accounts or alternative communication methods can provide more useful clinical information when selected according to a patient’s preferences.

Why Joint Hypermobility Appears in This Research

Joint hypermobility refers to movement beyond the usual joint range. It is common and often asymptomatic. Symptomatic hypermobility can involve instability, pain, and functional limitations.

Clinical diagnoses such as hypermobility spectrum disorders and hypermobile Ehlers-Danlos syndrome have their own criteria. Fibromyalgia is a separate chronic pain diagnosis. Co-occurrence does not make these conditions interchangeable.

A separate 2026 study examined connective tissue characteristics and neurodevelopmental traits in hypermobile people with anxiety. The authors found that the number of variant connective tissue features was associated with neurodevelopmental screening characteristics (Quadt et al., 2026a). Its selected population and observational design limit generalization. The findings expand the research questions surrounding connective tissue, pain, and neurodevelopment without establishing a common cause.

When Chronic Pain Assessment Misses Patients

Much of clinical pain assessment depends on patient description. This creates difficulties when the standard encounter assumes rapid verbal responses and conventional pain vocabulary. Autistic patients can have diverse communication styles, interoceptive experiences, and processing needs. A person who communicates differently can still experience significant physical pain.

Clinical evaluation can accommodate these needs through written histories, sufficient processing time, and accessible communication options. Persistent or worsening symptoms also require appropriate medical investigation. A diagnosis of autism or ADHD is not an adequate clinical explanation for widespread pain on its own.

Symptoms may fluctuate significantly across a day or week. Describing functional capacity over time, including recovery demands following activity, can improve the clinical picture beyond what is observable during a short visit.

Treatment and Accessibility

Fibromyalgia management usually combines individualized symptom management with strategies addressing function and quality of life. NIH guidance discusses appropriately selected medication, activity, and interventions for sleep and pain coping (NIAMS, n.d.; NCCIH, n.d.). Treatment response varies, and clinician supervision is necessary for medication decisions.

Some autistic patients benefit from predictable instructions or sensory-accessible treatment environments. ADHD-related executive functioning difficulties can make complicated medication or appointment routines harder to manage. Accommodation planning should be specific to the patient rather than based on assumptions about neurodivergence.

Significant symptom worsening following exertion warrants attention to possible post-exertional malaise and assessment for ME/CFS when clinically indicated. Activity recommendations appropriate for one chronic pain condition should not be applied indiscriminately to another.

Psychological support can help people live with chronic pain. Its inclusion in treatment does not establish a psychological cause for fibromyalgia.

Research Representation and Clinical Practice

Research on autism and pain often excludes people who need alternative communication methods or whose disabilities make standard study procedures inaccessible. The limited use of self-reported pain measures documented in the 2025 systematic review illustrates how research design can shape what clinicians know.

Evidence about fibromyalgia prevalence among Black autistic women and other intersecting populations remains inadequate. More representative studies could examine diagnostic delays, assessment practices, accessibility barriers, and the influence of healthcare access on recognition of chronic pain.

The available studies support clinical curiosity, accurate assessment of physical symptoms, and attention to developmental and sensory needs. They do not justify telling autistic or ADHD people that chronic pain is inevitable, or diagnosing fibromyalgia from neurodivergence alone.

For patients with persistent unexplained pain, competent care requires investigation of physical symptoms and communication that allows the patient’s experiences to enter the clinical record. Research into overlapping conditions can improve that process only when its findings are interpreted within their methodological limits.

Scholarly Integrity Statement

This Neuro News reference article distinguishes established clinical information about fibromyalgia from observational research involving neurodevelopmental screening, chronic pain, fatigue, and connective tissue. Reported associations are not presented as proof of causation. Healthcare accessibility discussion represents clinical and editorial analysis informed by cited literature. This article provides educational information and is not individualized medical advice.

References

Garriga-Cazorla, H., Roman-Juan, J., Martí, L., Solé, E., Martínez-Leal, R., & Miró, J. (2025). Chronic pain in autism: A systematic review. The Clinical Journal of Pain, 41(8). https://doi.org/10.1097/AJP.0000000000001296

National Center for Complementary and Integrative Health. (n.d.). Fibromyalgia: In depth. National Institutes of Health. https://www.nccih.nih.gov/health/fibromyalgia-in-depth

National Institute of Arthritis and Musculoskeletal and Skin Diseases. (n.d.). Fibromyalgia: Diagnosis, treatment, and steps to take. National Institutes of Health. https://www.niams.nih.gov/health-topics/fibromyalgia/diagnosis-treatment-and-steps-to-take

Quadt, L., Csecs, J., Savage, G., Davies, G., Ramanuj, P., Hakim, A. J., Grey, N., Critchley, H. D., & Eccles, J. A. (2026a). Beyond bendy joints: Number of variant connective tissue features predicts neurodivergent characteristics in hypermobile individuals with anxiety. npj Mental Health Research, 5, Article 51. https://doi.org/10.1038/s44184-026-00214-5

Quadt, L., Savage, G., Bond, R., Davies, K. A., Critchley, H. D., & Eccles, J. A. (2026b). Likely neurodivergence and variant connective tissue in patients with chronic pain/chronic fatigue: A case-control study. Journal of Psychiatric Research, 197, 125–132. https://doi.org/10.1016/j.jpsychires.2026.02.036