A systematic scoping review and conceptual analysis of new-onset fibromyalgia manifestations after non-hospitalized COVID-19: 2026 Plaut

[Andy]

Full title: A systematic scoping review and conceptual analysis of new-onset fibromyalgia manifestations after non-hospitalized COVID-19: empirics, definitions, methodologies, pathophysiology, mapping of literature, and knowledge gaps

Abstract​

Background​

The global coronavirus pandemic has led to a quiet wave of a chronic illness referred to as ‘Long/Post Covid-19 syndrome’ (LC) which bears a notable resemblance to functional-somatic or ‘fibromyalgia-type’ syndromes, and whose pathophysiology is undetermined. The lack of effective therapies for LC is straining healthcare systems worldwide and causing widespread public health and socioeconomic concerns. “Fibromyalgia” is a controversial chronic pain condition of unknown etiology largely attributed to generalized sensory hypersensitivity due to dysregulated central pain processing pathways (i.e. neuroplasting central sensitization). Despite intense research and growing attention in the scientific community, the clinical overlap of fibromyalgia, somatic symptom disorder, and post-viral chronic fatigue, is a medical puzzle yet to be solved, especially when occurring in non-severe infections and previously healthy individuals.

Methods​

This systematic scoping review covers the empirical findings on new-onset fibromyalgia manifestations after non-hospitalized covid-19. MEDLINE, Web of Science, and APA PsycINFO were searched in a systematic scoping approach for empirical studies on new-onset fibromyalgia after non-severe non-hospitalized covid-19, charting study characteristics and outcome data. A total of 228 records were included.

Findings​

Various types of methods, tools, and study designs are being used for LC research, with inconsistency in key concepts and definitions. This leads to a fragmented understanding of the relationship between SARS-CoV-2 infection and LC. Prevalence studies of post-Covid fibromyalgia are ongoing and susceptible to bias. The empirical evidence supports an overlap between LC, chronic fatigue syndrome, and fibromyalgia but the molecular mechanisms still remain unclear. There are conflicting findings regarding presence of viral particles, central sensitization, autoantibodies, and more.

Discussion​

This review highlights the need for standardized definitions and rigorous methodologies in research on LC. Future research should focus on epidemiological population-based studies with representative sampling and improving methodology, refining evolving definitions, harmonization of research, elucidating neurological mechanisms in hypothesis driven studies, and developing effective therapeutic strategies. The discussion synthesizes findings and offers an integrative mechanism for the pathophysiology of fibromyalgia and multisystem medically unexplained manifestations of LC as a non-autoimmune connective tissue disease. It helps explain neuropsychiatric and psychosomatic manifestations and is used to make testable theory-based predictions for future hypothesis-driven investigations.

Open access

 

[Andy]

"Interestingly, the medically unexplained multisite symptoms of LC have symptomatologic overlap and a surprising resemblance to functional psychosomatic syndromes such as myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and fibromyalgia and may even share a similar pathophysiology (9–14)."

 

[Hutan]

Author: Shiloh Plaut
Department of Family Medicine, Meuhedet Health Services, Jerusalem, Israel

 

[rvallee]

Despite intense research and growing attention in the scientific community

Can anyone point to that "intense research and growing attention"? Because it just doesn't exist. The vast majority of "research" is like this paper, trying very hard to prove old myths instead of doing real work. There are sub-sub-sub-areas of diseases with far fewer people affected and a far lower disease burden with far more research activity than this, both by quantity and quality.

This review highlights the need for standardized definitions and rigorous methodologies in research on LC. Future research should focus on epidemiological population-based studies with representative sampling and improving methodology, refining evolving definitions, harmonization of research, elucidating neurological mechanisms in hypothesis driven studies, and developing effective therapeutic strategies.

Ah, yes, no one has ever thought of that before. Certainly no one has ever advocated for that. Not consistently for decades. Definitely not millions of real people. Certainly not met with hostile disparagement in response. Nope, this is a brand-new insight.

Instead we got... whatever the hell this is:

It helps explain neuropsychiatric and psychosomatic manifestations and is used to make testable theory-based predictions for future hypothesis-driven investigations.

This is the "intense research and growing attention" alluded to in the intro paragraph. It's worthless, hence zero progress made. But, sure, let's keep doing things the same way, with the same intent, and expecting the same outcomes. That won't work, but no one but those affected cares so whatever, right? Let's just stick to the low-volume low-quantity efforts at making up false models and pretending that fake solutions to those false models will yield anything at all.

Interestingly, the medically unexplained multisite symptoms of LC have symptomatologic overlap and a surprising resemblance to functional psychosomatic syndromes such as myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and fibromyalgia and may even share a similar pathophysiology

How the hell does it make sense to speak of psychosomatic syndromes and pathophysiology when psychosomatic models are built explicitly on the assertion that there is no such thing? This is like doing electrical engineering and somehow roping in angels capable of perpetual motion.

 

[rvallee]

This paper would have been far more valuable if wasn't deferential to the psychobehavioral framing as inherently valid. It doesn't push it as an assertion, but it's very uncritical of the evidence basis for those models, and way too lenient about its quality and integrity. It certainly doesn't lend credibility to the notion of intense research, though.

Equipoise doesn't actually work when bullshit is equated with valid concepts. Just like journalists should be expected to say whether it's actually raining or not, rather than both-siding it with "one party says yes, the other says no". Unfortunately this breaks down entirely when it's easy to find experts who will both-sides reality all on their own.