What it is
Concussion symptoms usually fade in weeks. But for some people — including many veterans and athletes — headaches, brain fog, memory trouble, sleep problems, and mood changes persist for months or years. That's persistent post-concussive syndrome, and standard medicine offers it frustratingly little.
How hyperbaric oxygen helps — what we actually know
The theory: injured brain regions show reduced blood flow and metabolism long after injury, and repeated oxygen-under-pressure exposure may stimulate vascular repair and neuroplasticity in those regions. The evidence: multiple randomized trials report symptom and cognitive improvements; skeptics note some trials showed sham-pressure groups improving too. Newer imaging-based studies strengthen the biological case. Our grade: B — genuinely promising, not yet settled.
What treatment looks like
Research protocols typically use 40 sessions at 1.5–2.0 ATA, 60 minutes each. This is an off-label use: insurance won't cover it, and we quote the full cost before you commit.
- We'll show you the actual studies — including the critical ones — before you decide.
- Veterans: ask about our dedicated TBI program.
The evidence, honestly
Grade B — Good Evidence
Meaningful clinical studies support benefit; more trials would strengthen certainty.
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Hyperbaric oxygen therapy for post-concussion syndrome: contradictory conclusions from a controlled trial
Medical Gas Research · 2017 · n=63 · rct
Reported improvements in post-concussive symptoms and cognition with HBOT, while noting the field's ongoing controversy over sham-pressure control groups also improving.
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The effect of hyperbaric oxygen on symptoms after mild traumatic brain injury
Journal of Neurotrauma · 2012 · n=50 · rct
Randomized sham-controlled military trial in which both the HBOT and sham groups improved similarly, suggesting the benefit seen in some studies may not be specific to oxygen at pressure.
Common questions
Why doesn't insurance cover this if trials show benefit?
Because the evidence, while promising, hasn't yet met the bar payers require — partly due to debate over control groups in the trials. That's the honest state of the science, and it's why this is self-pay today.
How long after my injury can I try this?
Trials have enrolled people months to years post-injury, with improvements reported even in chronic cases. Time since injury doesn't appear to close the door.
Educational content, not medical advice — see our medical disclaimer. Last medically reviewed July 2026 by Dr. David Greene, MD.