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Open research questions in Fibromyalgia and Chronic Fatigue Syndrome Research

149 unresolved questions extracted from the limitations and future-work sections of 633 Fibromyalgia and Chronic Fatigue Syndrome Research papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • There is a limited understanding of fatigue mechanisms. Clinical treatments focus on lifestyle modifications, but there is a need for novel therapeutics and management strategies. The paper aims to address this gap by characterizing fatigue-like manifestations triggered by acute restraint stress and LPS or saline.

    Behavioral and molecular characterization of fatigue-like manifestations triggered by acute restraint stress and LPS or saline · 2026 · DOI

  • Validate proposed biomarkers across both population and brain diversity, - Use PET, Magnetic Resonance Spectroscopy (MRS), and functional Magnetic Resonance Imaging (fMRI) to characterize heterogeneity

    The dual diversity crisis in EEG biomarker research for cognitive fatigue · 2026 · DOI

  • Neglect of population diversity in biomarker research - Neglect of brain diversity, or neurobiological heterogeneity, within diagnostic groups - Lack of methodological rigor to validate biomarkers across diverse populations and brain types

    The dual diversity crisis in EEG biomarker research for cognitive fatigue · 2026 · DOI

  • The paper identifies the need to examine how markers behave under intervention. It highlights the importance of assessing subgroup variability in classification performance. The paper discusses the current limitations of reported classification performance.

    Transdiagnostic Biomarkers and Mechanistic Heterogeneity in Cognitive Fatigue: A Response to Rudroff · 2026 · DOI

  • The lack of understanding of the shared genetic and environmental risk factors between FSD and IPD. The need for a large-scale study to investigate the comorbidity of FSD and IPD.

    A multivariate Swedish national twin-sibling study in women of major depression, anxiety disorder, fibromyalgia, and irritable bowel syndrome · 2025 · DOI

  • Small sample size, - Limited to female ME/CFS patients, - No control for other treatments or interventions

    Disentangling pain and fatigue in chronic fatigue syndrome: a resting state connectivity study before and after cognitive behavioral therapy · 2024 · DOI

  • Investigation of how and in whom behavioral and biomedical treatments affect these networks, - Examination of the effects of CBT on fatigue and pain symptoms in ME/CFS patients, - Study of the neural mechanisms underlying fatigue and pain symptoms in ME/CFS

    Disentangling pain and fatigue in chronic fatigue syndrome: a resting state connectivity study before and after cognitive behavioral therapy · 2024 · DOI

  • The nature of the association between internalizing disorders and functional disorders is not well understood. There is a lack of studies investigating the direction of causation between internalizing disorders and functional disorders. The etiology of both types of disorders is not well understood.

    Prospective associations between major depressive disorder, generalized anxiety disorder, fibromyalgia, and myalgic encephalomyelitis/chronic fatigue syndrome · 2025 · DOI

  • Fibromyalgia (FM) has been linked to autonomic dysregulation, but population-level evidence on blood pressure (BP) in FM is sparse, and whether BP differences are present before diagnosis is unknown.

    Lower Blood Pressure Extremes Precede the Recorded Diagnosis of Fibromyalgia by up to Two Decades: A Population-Based Matched Case–Control Study · 2026 · DOI

  • Despite evidence showing associations between pain and depression, the additive effect of co-occurring pain conditions on depression risk and the underlying mechanisms remain unclear.

    The inflammatory and genetic mechanisms underlying the cumulative effect of co-occurring pain conditions on depression · 2025 · DOI

  • Further research on the differences between these groups is warranted to enhance treatment targeting.

    The association between quality of life and psychological flexibility, depressive, anxiety or insomnia symptoms in patients with persistent indoor environment-related symptoms or chronic fatigue · 2025 · DOI

  • BACKGROUND: Treatment for symptoms associated with environmental factors (SAEF), such as electrohypersensitivity or multiple chemical sensitivity, have been sparsely investigated thus far.

    Efficacy of cognitive and behavioral therapy (CBT) treatment for individuals living with symptoms associated with environmental factors (SAEF): protocol for a randomized controlled trial · 2025 · DOI

  • However, few studies have explored the specific variables involved in the relationship between post-traumatic stress disorder (PTSD) and the severity of central sensitization.

    Trauma and psychological impact in fibromyalgia and other central sensitization syndromes: the role of anxiety and pain acceptance · 2025 · DOI

  • The biological basis for PTLDS is poorly understood and no evidence-based treatment has been identified.

    A comparison of genome-wide association analyses of persistent symptoms after Lyme disease, fibromyalgia, and myalgic encephalomyelitis – chronic fatigue syndrome · 2025 · DOI

  • However, for clinical application, the specificity of these biomarkers to ME/CFS needs to be explored in more disease controls, and their practicality/logistics considered.

    The search for a blood-based biomarker for Myalgic Encephalomyelitis/ Chronic Fatigue Syndrome (ME/CFS): from biochemistry to electrophysiology · 2025 · DOI

  • Long-term associations between COVID-19, new-onset CFS/ME, and other independent predictors such as vaccination for SARS-CoV-2, re-infection, and blood biomarkers at time of infection remain unclear.

    Elevated risk of new-onset chronic fatigue syndrome/myalgic encephalomyelitis up to four years after SARS-CoV-2 infection · 2025 · DOI

  • Nevertheless, a definitive and universally accepted generalization concerning the comprehensive effects of fatty infiltration on the musculoskeletal system remains elusive.

    Fatty infiltration in the musculoskeletal system: pathological mechanisms and clinical implications · 2024 · DOI

  • BACKGROUND AND OBJECTIVES: Fibromyalgia has many unmet needs relating to treatment, and the delivery of effective and evidence-based healthcare is lacking.

    Using Natural Language Processing and Social Media Data to Understand the Lived Experience of People with Fibromyalgia · 2024 · DOI

  • Knowledge about pathogenesis is lacking, diagnosis difficult, clinical approach puzzling, and patient management disappointing.

    Fibromyalgia pathogenesis explained by a neuroendocrine multistable model · 2024 · DOI

  • It is a poorly understood disorder that mainly affects women and leads to chronic pain, fatigue, and insomnia, among other symptoms, which decrease quality of life.

    Nutrition and Chronobiology as Key Components of Multidisciplinary Therapeutic Interventions for Fibromyalgia and Associated Chronic Fatigue Syndrome: A Narrative and Critical Review · 2024 · DOI

  • Further, translation of results to impairment status and approaches to symptom reduction are lacking.

    Cardiopulmonary and metabolic responses during a 2-day CPET in myalgic encephalomyelitis/chronic fatigue syndrome: translating reduced oxygen consumption to impairment status to treatment considerations · 2024 · DOI

  • However, there is limited knowledge regarding their potential association with circulating biomarkers and illness severity in these conditions.

    Association of circulating biomarkers with illness severity measures differentiates myalgic encephalomyelitis/chronic fatigue syndrome and post-COVID-19 condition: a prospective pilot cohort study · 2024 · DOI

  • The pathogenesis of Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) remains unclear, though increasing evidence suggests inflammatory processes play key roles.

    Immunometabolic changes and potential biomarkers in CFS peripheral immune cells revealed by single-cell RNA sequencing · 2024 · DOI

  • Investigating the relationship between chemosensory function and post-viral chronic illness. Developing novel therapeutic strategies for ME/CFS based on the paper's findings. Further studying the mechanisms of cellular metabolism, inflammation, vascular dysfunction, and autonomic dysregulation in ME/CFS and long-COVID pathophysiology.

    A hypothesis connecting dysgeusia due to defects in ATP-P2X3 signaling and fatigue in myalgic encephalomyelitis/chronic fatigue syndrome: lessons learned from long-COVID · 2026 · DOI

  • There are no objective biomarkers for ME/CFS despite decades of research. The mechanisms of cellular metabolism, inflammation, vascular dysfunction, and autonomic dysregulation in ME/CFS and long-COVID pathophysiology are not well understood.

    A hypothesis connecting dysgeusia due to defects in ATP-P2X3 signaling and fatigue in myalgic encephalomyelitis/chronic fatigue syndrome: lessons learned from long-COVID · 2026 · DOI

Most-cited papers in Fibromyalgia and Chronic Fatigue Syndrome Research

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149 open questions have been extracted from the limitations and future-work passages of 633 Fibromyalgia and Chronic Fatigue Syndrome Research papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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