HBOT & Fibromyalgia — What the Research Shows · Oceanside, CA
FIBROMYALGIA
IS REAL. AND IT
IS COMPLEX.
Fibromyalgia affects an estimated 4 million Americans — with widespread pain, debilitating fatigue, cognitive fog, and disrupted sleep that conventional medicine has struggled to address effectively. Researchers are now investigating hyperbaric oxygen therapy as a tool that may address some of the underlying neurological and inflammatory mechanisms driving fibromyalgia symptoms. This page explores what the science currently shows.
This page is educational and informational. It does not claim that HBOT treats, cures, or prevents fibromyalgia or any other condition. HBOT is not an FDA-approved treatment for fibromyalgia. Please work with your rheumatologist or pain management team for personalized guidance.
What the Research Shows
Sig.
Improvement in fibromyalgia impact scores across 4 RCTs, 163 participants — meta-analysis 20231
70%
Significant improvement in pain intensity, catastrophizing, and quality of life in RCT2
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Rated PT Clinic — North County 2025
Understanding Fibromyalgia
IT'S NOT "IN YOUR HEAD" — THE NERVOUS SYSTEM IS GENUINELY DYSREGULATED.
For decades, fibromyalgia was poorly understood and often dismissed. Modern research has established that fibromyalgia involves measurable abnormalities in how the central nervous system processes pain — a phenomenon researchers call central sensitization. The pain amplification is real, neurological, and physiological — not imagined or exaggerated.
Central sensitization means the brain and spinal cord become hypersensitive — interpreting normal sensory signals as painful. Touch that wouldn't bother most people triggers significant discomfort. This dysregulation is accompanied by mitochondrial dysfunction in muscle tissue, neuroinflammation, disrupted sleep architecture, and chronic fatigue — creating a cycle that is self-reinforcing and difficult to break.
The Core Mechanisms Researchers Have Identified
Central sensitization — the CNS amplifies pain signals, lowering the threshold for discomfort
Mitochondrial dysfunction — inadequate cellular energy production in muscle tissue drives fatigue and pain
Neuroinflammation — chronic immune activation in the brain and nervous system amplifies symptoms
Sleep disruption — poor sleep worsens pain sensitivity, creating a reinforcing cycle
"Hyperbaric oxygen therapy significantly improved fibromyalgia impact scores, pain intensity, and quality of life — with effects consistent across four randomized controlled trials."
— Cao et al., meta-analysis of 4 RCTs, Clinical Practice, 2023
Why HBOT Is Being Investigated
HBOT TARGETS SEVERAL FIBROMYALGIA MECHANISMS SIMULTANEOUSLY.
What makes HBOT particularly interesting to fibromyalgia researchers is that it appears to address several of the core biological drivers of the condition at once — rather than managing individual symptoms in isolation.
The leading hypothesis is that fibromyalgia involves inadequate oxygen delivery to neural and muscle tissue — creating the energy deficit and mitochondrial dysfunction that underlies widespread pain and fatigue. By dramatically increasing oxygen availability throughout the body and nervous system, HBOT may help restore the metabolic conditions necessary for normal pain processing and cellular energy production.
What the 2023 Meta-Analysis Found
4 randomized controlled trials included — the gold standard of clinical evidence
163 fibromyalgia patients enrolled across the included studies
Fibromyalgia Impact Questionnaire scores improved significantly in HBOT groups
Pain intensity, fatigue, and quality of life all showed meaningful improvement
Consistent findings across multiple independent research groups
Fibromyalgia is one of the conditions where HBOT research has been most consistently positive — with multiple RCTs showing similar results across different populations and research teams.
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The Research Angle
WHAT HBOT DOES
THAT RESEARCHERS
ARE INVESTIGATING
THAT RESEARCHERS
ARE INVESTIGATING
HBOT delivers 100% oxygen at increased atmospheric pressure. For fibromyalgia, researchers are investigating whether this oxygen surge can address the neurological and metabolic dysfunction at the root of widespread pain, fatigue, and cognitive symptoms.
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Central Sensitization Reset
Central sensitization — the CNS's hypersensitivity to pain signals — is considered the primary neurological mechanism in fibromyalgia. HBOT's effects on cerebral blood flow, neuroinflammation, and neural metabolism may help normalize pain processing pathways. Brain SPECT imaging in fibromyalgia HBOT trials has shown measurable changes in neural activity in pain-processing regions following treatment — providing objective confirmation alongside symptom improvements.
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Mitochondrial Support
Mitochondrial dysfunction in muscle and neural tissue is a well-documented feature of fibromyalgia — inadequate cellular energy production contributes directly to fatigue, weakness, and the characteristic post-exertional malaise. HBOT's high-oxygen environment supports mitochondrial function and stimulates mitochondrial biogenesis. Researchers are investigating whether improving mitochondrial energy production can break the energy deficit cycle that sustains fibromyalgia symptoms.
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Neuroinflammation Reduction
Neuroinflammation — chronic immune activation within the brain and nervous system — drives central sensitization and amplifies pain signals. HBOT has documented anti-neuroinflammatory effects, including reductions in microglial activation and pro-inflammatory cytokine levels in neural tissue. By reducing the inflammatory burden on the nervous system, HBOT may help lower the overall level of sensitization — reducing the baseline pain signal that fibromyalgia patients experience.
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Tissue Oxygenation
Some fibromyalgia research has identified impaired oxygen delivery to muscle tissue as a contributing factor in widespread pain and fatigue. Under hyperbaric conditions, oxygen dissolves directly into plasma and reaches tissues that normal circulation may be inadequately supplying. Researchers are investigating whether restoring adequate oxygen levels to hypoxic muscle tissue can improve the local metabolic environment and reduce the pain amplification associated with inadequately oxygenated tissue.
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Sleep Architecture Improvement
Disrupted sleep is both a symptom and a driver of fibromyalgia — poor sleep worsens central sensitization, which worsens sleep, creating a reinforcing cycle. HBOT has been associated with improvements in sleep quality in multiple study populations. By improving sleep architecture, HBOT may help interrupt this cycle — allowing the nervous system the restorative conditions it needs to reduce baseline pain sensitization over time.
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Stem Cell Mobilization
Research at the University of Pennsylvania found HBOT increased circulating stem cells by 800% — the body's primary repair cells. In fibromyalgia, where chronic tissue stress and inflammation may have compromised the repair of neural and muscular microstructure, this stem cell mobilization may support recovery processes that have been chronically insufficient. Researchers are exploring whether this mechanism contributes to the sustained symptom improvements observed following HBOT protocols.
Important Context
Fibromyalgia is one of the conditions with the strongest HBOT evidence base among chronic pain conditions — multiple independent RCTs have shown consistent results. The 2013 Buskila trial even included brain SPECT imaging that showed objective neural changes alongside symptom improvement. That said, fibromyalgia is a complex, multifactorial condition. HBOT is not a cure, and not all patients respond the same way. It is best understood as one tool in a comprehensive approach that also includes exercise, sleep hygiene, stress management, and appropriate medical care.
The Clinical Evidence
WHAT THE STUDIES
HAVE FOUND
HAVE FOUND
Fibromyalgia has one of the more robust HBOT evidence bases among chronic pain conditions — with multiple independent randomized controlled trials producing consistent results.
Meta-Analysis · Clinical Practice 2023
CONSISTENT IMPROVEMENT ACROSS 4 RCTS AND 163 FIBROMYALGIA PATIENTS
A 2023 meta-analysis by Cao et al. pooled data from four randomized controlled trials enrolling 163 fibromyalgia patients. Meta-analyses carry more evidential weight than individual trials because they combine independent results — reducing the chance that any single finding was a statistical anomaly.
Results showed significant improvement in Fibromyalgia Impact Questionnaire scores, pain intensity, fatigue, and quality of life in HBOT groups across all four included trials. The consistency of findings across independent research groups and populations strengthened the conclusion that HBOT produces a genuine, reproducible effect in fibromyalgia — not a study-specific anomaly.
Source: Cao et al., Clinical Practice, 2023.
RCT · Medicina Clínica 2024
70% SIGNIFICANT IMPROVEMENT IN PAIN, CATASTROPHIZING, AND QUALITY OF LIFE
A randomized controlled trial by Izquierdo-Alventosa et al. published in Medicina Clínica (2024) enrolled fibromyalgia patients in an HBOT protocol, measuring pain intensity, pain catastrophizing, and health-related quality of life as primary endpoints. These outcomes were selected because they capture the full impact of fibromyalgia beyond pain scores alone.
Results showed significant improvement in all three measures — including pain catastrophizing, which reflects the psychological amplification of pain that is a particularly difficult feature of fibromyalgia to treat. Improvements in catastrophizing suggest HBOT may be influencing central pain processing at a neurological level, not just peripheral symptoms. Researchers noted the effect size was clinically meaningful, not just statistically significant.
Source: Izquierdo-Alventosa et al., Medicina Clínica, 2024.
RCT with Brain Imaging · PLOS ONE 2015
BRAIN IMAGING CONFIRMED NEURAL CHANGES ALONGSIDE SYMPTOM IMPROVEMENT
A randomized controlled trial by Buskila et al. enrolled female fibromyalgia patients in an HBOT protocol, measuring symptom outcomes alongside brain SPECT imaging. The imaging component was significant: it allowed researchers to document objective changes in brain activity alongside the self-reported symptom improvements — addressing the concern that HBOT effects in fibromyalgia could be placebo-driven.
Both the symptom data and brain imaging showed significant improvements — with SPECT images confirming increased activity in previously hypoactive brain regions associated with pain processing and regulation. The alignment between the objective imaging findings and the symptom improvements provided strong mechanistic support for HBOT's effects in fibromyalgia. Several participants were able to reduce medication use following the protocol.
Source: Buskila et al., PLOS ONE, 2015. DOI: 10.1371/journal.pone.0127012
The Broader Research Context
Fibromyalgia is arguably the chronic pain condition with the strongest HBOT evidence base — the combination of multiple independent RCTs, a meta-analysis, and brain imaging confirmation is unusual in this field. The imaging data is particularly significant because it moves fibromyalgia HBOT research beyond symptom self-report into objective neurological measurement — the same type of evidence that has driven adoption of HBOT in TBI and concussion research.
At Land and Sea PT, we work with people dealing with chronic pain conditions including fibromyalgia who are looking for approaches beyond medication management. We offer HBOT as a wellness service, and we take the research seriously. If you've been struggling with fibromyalgia and want to understand what HBOT might add to your approach, we're glad to have that conversation.
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OTHER CONDITIONS
PEOPLE ARE EXPLORING WITH HBOT
PEOPLE ARE EXPLORING WITH HBOT
HBOT is being studied across a wide range of conditions. Explore what the research shows for other areas at Land and Sea PT in Oceanside.
🔥 Inflammation & Recovery
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Long COVID
Fatigue, brain fog, breathlessness
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Autoimmune
Immune dysregulation, inflammation
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Chronic Fatigue
Low energy, brain fog, exhaustion
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Chronic Inflammation
Systemic inflammatory response
⚡
Chronic Pain
Persistent pain, neuropathy, fibromyalgia
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Fibromyalgia
Widespread pain, fatigue, sensitivity
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Lyme Disease
Chronic symptoms, fatigue, joint pain
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Tissue Recovery
Wound healing, diabetic tissue health
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Neuropathy
Nerve pain, tingling, numbness
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Post-Surgical Recovery
Healing, swelling, tissue repair
🧠 Brain & Nervous System
Done Settling for "This Is Just How It Is"?
LET'S HAVE A
CONVERSATION.
CONVERSATION.
If you're living with fibromyalgia and looking for approaches that go beyond symptom management, we're here to walk you through what HBOT is, what the research shows, and whether it fits into your current plan.
This page is educational only. HBOT is not an approved treatment for fibromyalgia or any chronic pain condition. Results vary between individuals. Please work with your rheumatologist or pain management provider. HBOT at Land and Sea PT is offered as a wellness service.
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References
- Cao et al. Meta-analysis of HBOT in fibromyalgia, 4 RCTs. Clinical Practice, 2023.
- Izquierdo-Alventosa et al. "Hyperbaric oxygen therapy in fibromyalgia." Medicina Clínica, 2024.
- Buskila et al. "Improvement of fibromyalgia symptoms following hyperbaric oxygen treatment." PLOS ONE, 2015. DOI: 10.1371/journal.pone.0127012