HBOT for Skin Conditions: Acne Scars, Eczema, and Psoriasis Evidence

Hyperbaric oxygen therapy (HBOT) shows up in dermatology clinics and wellness spas with bold promises: clearer skin, faded scars, calmer eczema, fewer psoriasis flares. The honest picture is narrower. HBOT has real, government-cleared roles in healing certain damaged skin, but for the everyday conditions people most want help with, the evidence ranges from thin to early, and a lot of it is case reports rather than the kind of trial that proves a treatment works.

This guide walks through what the science actually says for acne and acne scars, eczema (atopic dermatitis), and psoriasis. It separates the cleared uses from the off-label hopes, grades the evidence honestly, and tells you who might reasonably consider it and who is probably wasting money.

How HBOT Could Affect Skin: The Mechanism

HBOT means breathing close to 100% oxygen inside a pressurized chamber, usually at 2.0 to 2.4 times normal atmospheric pressure (ATA). Under pressure, far more oxygen dissolves directly into your blood plasma and reaches tissues that normally run short on it.

For skin, researchers point to a handful of plausible effects:

• More oxygen to starved tissue. Chronic wounds, grafts, and radiation-damaged skin are often hypoxic (low on oxygen). Flooding them with oxygen can restart stalled healing.
• New blood vessel growth (angiogenesis). Repeated sessions appear to stimulate fresh capillaries, improving long-term blood supply.
• More collagen. Oxygen is a required ingredient for the enzymes that build collagen, the protein behind firm skin and mature scar tissue.
• Anti-inflammatory shifts. In lab and small clinical studies, HBOT seems to nudge the immune system away from a pro-inflammatory state, lowering signals like IL-17A, TNF-alpha, and interferon-gamma that drive eczema and psoriasis.
• Antimicrobial effects. High oxygen levels are hostile to some bacteria and boost white blood cell killing power.

It helps to understand why the oxygen part matters so much. At normal pressure breathing room air, your red blood cells are already nearly saturated, so cranking up oxygen there does little extra. The trick HBOT pulls off is pressure: at 2.0 to 2.4 ATA, oxygen dissolves straight into the watery plasma part of your blood, independent of red cells. That plasma oxygen can seep into tissue that has poor blood flow, exactly the kind of low-oxygen pocket found in a stalled wound or a struggling skin graft. Healthy, well-supplied skin doesn't have that oxygen deficit to begin with — which is one quiet reason HBOT's logic is far stronger for damaged skin than for cosmetic touch-ups on normal skin.

Here's the catch that runs through this entire article: a believable mechanism is not proof of benefit. Plenty of treatments make biological sense and then fail in real trials. The mechanism tells you why HBOT might help skin. Only good clinical studies tell you whether it actually does, and for cosmetic and inflammatory skin conditions, those studies are mostly missing. Worse, the conditions people most want help with — acne, eczema, psoriasis — all come and go on their own. That makes it dangerously easy to give the chamber credit for a flare that was about to settle down anyway.

What HBOT Is Actually Cleared and Proven For (Skin Edition)

Before the off-label stuff, it helps to know where HBOT for skin stands on solid ground. The FDA clears HBOT devices, and the Undersea and Hyperbaric Medical Society (UHMS) maintains the list of indications backed by enough evidence to be standard care. Several of these involve skin and wounds.

The line is sharp. When the problem is damaged or poorly oxygenated skin that won't heal — a diabetic ulcer, a failing graft, radiation-injured tissue — HBOT has earned its place. When the problem is a common inflammatory or cosmetic skin condition, you've crossed into off-label territory where the evidence gets thin fast.

For a deeper look at the wound-healing side, see our HBOT wound healing clinical evidence review and the full list of FDA-approved HBOT conditions.

Acne and Acne Scars: The Weakest Case

This is where marketing runs furthest ahead of science.

Active acne. The theory sounds reasonable: acne involves inflammation and the bacterium Cutibacterium acnes, which prefers low-oxygen environments. Flood the skin with oxygen, calm inflammation, and acne should improve. There are scattered small reports and a frequently cited tiny study of mild acne, but no large, well-controlled randomized trials show HBOT clears acne better than standard treatments like topical retinoids, benzoyl peroxide, or antibiotics. Those standard treatments are cheap, proven, and don't require sitting in a pressurized chamber 40 times.

Acne scars. This is the more interesting and more honest question. HBOT doesn't "erase" scars. What it can do, based on wound-healing biology, is support better tissue repair when paired with a procedure that actively remodels the skin, like fractional laser resurfacing or surgical scar revision. The logic: laser injures the skin to trigger remodeling, and extra oxygen plus angiogenesis may help that remodeling go better. But this is an adjunct idea, not a standalone scar treatment, and the direct trial evidence in acne scars specifically is essentially absent. A 2024 evidence-based review of HBOT in aesthetic practice looked at 17 human studies and found mostly weak, high-risk-of-bias data, with the authors calling for proper randomized trials before any confident claims.

It's worth being specific about what "adjunct" would even mean here. Fractional laser punches thousands of microscopic columns of controlled injury into scar tissue, which triggers a fresh round of collagen remodeling over weeks to months. The case for adding HBOT is that the healing phase after laser is oxygen-hungry, and chamber oxygen plus new blood vessels could help the skin rebuild more smoothly with less downtime. That's the same biology behind the cleared wound-healing uses. The difference is that nobody has run the trial. Until someone randomizes scar patients to laser-alone versus laser-plus-HBOT and measures the difference, "it might help recovery" stays a hypothesis, not a selling point. And the cost of bolting 20-plus chamber sessions onto a laser series is steep for an unproven edge.

Honest grade: very weak. If a clinic pitches HBOT as an acne or acne-scar treatment, treat that as a red flag. The biology is suggestive; the evidence is not there. Spend your money on dermatologist-proven acne care first. Curious how HBOT stacks up against another popular light-based skin treatment? See HBOT vs red light therapy.

Eczema (Atopic Dermatitis): Early, Mildly Encouraging, Unproven

Eczema is where the off-label evidence is most interesting — still weak, but at least pointing somewhere.

Atopic dermatitis is an inflammatory, itchy skin condition driven by an overactive immune response and often elevated IgE (an allergy antibody). Because HBOT shifts the immune system toward an anti-inflammatory state and increases tissue oxygen, several small studies have tested it in stubborn cases.

The most-cited is a 2021 study of 15 children with severe atopic dermatitis that hadn't responded well to standard medicines. After a course of HBOT, researchers reported reduced skin lesion extent and intensity, less redness and oozing, less itching, better sleep, and a statistically significant drop in serum IgE. A 2025 review pulled together the available clinical studies — roughly 5 studies and about 61 patients total — and found a consistent pattern: lower IgE, less itch, and modest improvement in SCORAD severity scores. Animal work backs the mechanism, including a mouse study showing hyperoxygenation eased eczema-like skin through changes in reactive oxygen species and regulatory T cells.

So why isn't this a recommendation?

• Tiny numbers. Sixty-one patients across all studies combined is nothing.
• No control groups. Most studies had no comparison arm, so improvement could come from the natural ups and downs of eczema, other treatments, or placebo effect — not the chamber.
• No standard protocol. Pressure, session count, and oxygen delivery varied.

The 2025 reviewers were blunt: promising signals, but "further large-scale clinical trials are essential" before HBOT can be called a validated eczema treatment.

There's also no agreed-upon "dose." Reported eczema courses have used different pressures, different numbers of sessions, and different ways of delivering the oxygen (mask versus helmet/hood), sometimes even comparing topical oxygen to true pressurized HBOT. When studies that small disagree on the basic recipe, you can't yet say what protocol — if any — actually works. The IgE drop is genuinely interesting because it's an objective lab number rather than a subjective "my skin feels better." But a falling IgE is a marker moving in a hopeful direction, not proof that the disease itself is being controlled long-term.

Honest grade: weak but real signal. For severe, treatment-resistant eczema in someone already under a dermatologist's care, HBOT is a reasonable experimental add-on — not a replacement for proven options like topical steroids, calcineurin inhibitors, dupilumab, or JAK inhibitors.

Eczema Evidence at a Glance

Psoriasis: Case Reports Only

Psoriasis sits on the shakiest ground of the three.

It's an immune-driven condition where skin cells multiply too fast, building thick, scaly plaques. There's a real mechanistic rationale — HBOT's anti-inflammatory effects and influence on reactive oxygen species could theoretically dampen the immune signals behind plaques. A widely cited 2009 paper described two patients with psoriasis vulgaris who improved markedly with hyperbaric oxygen; one reportedly reached lasting remission. Lab and animal studies add some biological plausibility.

But two patients is two patients. There are no randomized controlled trials, no meaningful patient series, nothing that separates real effect from coincidence or placebo. Psoriasis is also famous for waxing and waning on its own, which makes case reports especially unreliable.

Meanwhile, psoriasis now has genuinely powerful proven treatments: topical vitamin D analogs and steroids, phototherapy, and biologic drugs (targeting IL-17, IL-23, TNF) that can clear skin almost completely. Against that backdrop, paying thousands of dollars for HBOT on the strength of two case reports makes little sense.

Honest grade: very weak. Interesting hypothesis, essentially no clinical evidence. Not a recommended psoriasis treatment.

Where the Skin Evidence Is Genuinely Stronger

To be fair to HBOT, several skin-adjacent uses with real evidence overlap with cosmetic interest:

• Pyoderma gangrenosum, a rare, painful ulcerating skin disease, has a 2024 scoping review supporting HBOT as a useful adjunct in refractory cases — still mostly case-based, but a recognized salvage option.
• Post-surgical wound healing. A small case-control study of facelift patients found those getting HBOT after surgery healed significantly faster (mean 13 days vs about 37 days). Small and not blinded, but it points to a real role in supporting recovery from skin surgery.
• Diabetic foot ulcers and grafts/flaps, covered above, where the cleared, evidence-backed uses live.

The pattern holds: HBOT helps skin that is wounded, surgically traumatized, or oxygen-starved, not skin that is simply inflamed (eczema, psoriasis) or aesthetically imperfect (acne, scars).

What Convincing Evidence Would Actually Look Like

It's fair to ask: if HBOT might help, why be so cautious? Because there's a clear standard for proving a skin treatment works, and HBOT for acne, eczema, and psoriasis hasn't met it.

Convincing evidence would mean a randomized controlled trial: patients split by chance into a real-HBOT group and a sham group, ideally with neither patients nor assessors knowing who got what. Sham hyperbaric chambers exist — they pressurize slightly with regular air so patients feel "something" without getting the therapeutic oxygen dose. That blinding matters enormously for skin conditions, where expectation alone can ease symptoms like itch. The trial would need enough patients to detect a real effect, a validated severity score (PASI for psoriasis, SCORAD or EASI for eczema), and follow-up long enough to show the benefit lasts after the sessions stop.

Right now, every off-label skin use in this article falls short of that bar. Eczema has the closest thing to a trail of clinical data but no controlled trials. Psoriasis has case reports. Acne and acne scars have essentially nothing rigorous. That's not a claim HBOT can't work — it's an honest statement that the proof isn't in yet, and you shouldn't pay as if it were.

HBOT vs Proven Alternatives for These Conditions

If your real goal is clearer or calmer skin, here's how HBOT compares with treatments that have actual evidence behind them.

In every row, cheaper and better-studied options come first. HBOT is, at most, a possible add-on for resistant cases — and only under medical supervision.

Safety, Cost, and Practical Reality

HBOT is generally safe when done at an accredited facility, but it isn't risk-free, and for off-label skin use the risk-benefit math is unfavorable.

Common and serious risks:

• Ear and sinus barotrauma (pressure pain) — the most common side effect.
• Temporary nearsightedness (myopia) that usually reverses after stopping.
• Oxygen toxicity seizures — rare but real at treatment pressures.
• Fire risk — the FDA has warned about fires in HBOT chambers because high-oxygen environments are extremely flammable. This is the strongest reason to avoid sketchy or unaccredited operators.
• Claustrophobia in monoplace chambers.

Cost reality: A full off-label course is typically 20 to 40 sessions, often $200 to $450 each out of pocket. That's $4,000 to $18,000 for a treatment with weak-to-no evidence for these skin conditions. Insurance won't cover it, because none of these uses is approved. Compare that to a tube of prescription cream or a course of laser.

Who should be cautious or avoid it: People with untreated pneumothorax (a hard contraindication), certain lung conditions, and anyone being pushed toward HBOT instead of proven dermatology care. For more, see our HBOT side effects and risks breakdown.

Who Might Reasonably Consider It

HBOT for skin makes the most sense in a narrow band:

• You have a cleared indication — a non-healing diabetic ulcer, a compromised graft or flap, radiation skin injury. This is where HBOT belongs.
• You're recovering from skin surgery and your surgeon recommends it to speed healing.
• You have severe, treatment-resistant eczema and a dermatologist is willing to try HBOT as a supervised, experimental add-on after proven options have failed.

Who should pass: anyone hoping HBOT will clear ordinary acne, erase scars on its own, or replace real psoriasis treatment. The evidence isn't there, and the money is better spent elsewhere. If you're weighing a chamber for general wellness, our guide on who is a good candidate for HBOT is a good reality check.

Frequently Asked Questions

Does HBOT cure acne?

No. There's no quality trial evidence that HBOT clears acne, and proven treatments like retinoids, benzoyl peroxide, and antibiotics work better, cost far less, and don't require dozens of chamber sessions. The oxygen-and-inflammation theory is plausible but unproven.

Can hyperbaric oxygen remove acne scars?

Not on its own. HBOT might support healing when combined with a scar-remodeling procedure like fractional laser or surgical revision, because of its effects on collagen and blood vessels. But direct evidence in acne scars is essentially absent, and a 2024 review of HBOT in aesthetics found the data weak and high-risk-of-bias.

Is HBOT proven to help eczema?

Not proven, but it shows the most promising early signal of the three. Small uncontrolled studies in severe atopic dermatitis report less itch, lower IgE, and modest severity improvement. With only about 61 patients across all studies and no control groups, it remains experimental — a possible supervised add-on for resistant cases, not a standard treatment.

Does hyperbaric oxygen therapy work for psoriasis?

The evidence is essentially two case reports from 2009 plus some lab work. That's far too little to call it effective. Psoriasis also fluctuates naturally, which makes case reports unreliable. With strong proven options available (phototherapy, biologics), HBOT isn't a sensible psoriasis treatment.

Will insurance cover HBOT for skin conditions like acne or eczema?

No. Insurance only covers FDA-cleared and UHMS-approved indications such as diabetic foot ulcers, compromised grafts, and radiation tissue injury. Acne, acne scars, eczema, and psoriasis are off-label, so you'd pay out of pocket — typically thousands of dollars for a full course.

Medical disclaimer: This article is for general information only and is not medical advice. Talk to a dermatologist or physician before starting hyperbaric oxygen therapy or changing treatment for any skin condition.

Sources

• Effects of Hyperbaric Oxygen Therapy in Children with Severe Atopic Dermatitis (J Clin Med, 2021)
• The Supporting Role of Hyperbaric Oxygen Therapy in Atopic Dermatitis Treatment (J Clin Med, 2025)
• Hyperoxygenation attenuated a murine model of atopic dermatitis through raising skin level of ROS (PLoS One, 2014)
• Therapeutic effect of hyperbaric oxygen in psoriasis vulgaris: two case reports and review (J Med Case Rep, 2009)
• The role, safety, and efficacy of hyperbaric oxygen therapy in aesthetic practice: an evidence-based review (J Cosmet Dermatol, 2024)
• Hyperbaric oxygen therapy as an adjuvant treatment in pyoderma gangrenosum: a scoping review (JEADV, 2024)
• Hyperbaric oxygen therapy for chronic wounds (Cochrane Database Syst Rev, 2015)
• PubMed search: hyperbaric oxygen and atopic dermatitis
• UHMS Indications for Hyperbaric Oxygen Therapy
• FDA: Follow Instructions for Safe Use of Hyperbaric Oxygen Therapy Devices
• Harvard Health: Hyperbaric oxygen therapy: evidence-based uses and unproven claims