Hyperbaric Oxygen Chambers may look peaceful from the outside, but inside they’re working under serious pressure, literally. So, are hyperbaric chambers pressurised? Short answer: absolutely. That pressure is what makes Hyperbaric Oxygen Therapy work in the first place. If you want to know how it works, why it matters, and what it actually feels like, keep reading.

Are Hyperbaric Chambers Pressurized? The Simple Answer
Yes, Pressurization is the Key to How They Work
The pressure inside the chamber is what pushes oxygen deeper into your body. Without it, you’d simply be sitting in a fancy tube breathing oxygen. Pressurisation is the engine behind Hyperbaric Oxygen Therapy’s therapeutic effects, and everything else builds on that.
Understanding Pressure: What Does It Mean?
The Concept of Atmospheres Absolute (ATA)
ATA is just a technical way of measuring how much pressure you’re under compared to normal air. One ATA is your everyday air pressure at sea level. A hyperbaric chamber turns that dial up, gently but purposefully to boost oxygen delivery.
An Everyday Analogy: Airplanes and Scuba Diving
If you’ve ever felt your ears pop on a plane or dipped underwater in a pool, you’ve already felt mild changes in pressure. Hyperbaric Oxygen Therapy works on the same principle, only in a controlled medical environment where that pressure is used for healing instead of travel or fun.
Why is Pressure So Important in Hyperbaric Oxygen Therapy?
The Role of Henry's Law: Forcing Oxygen into the Body
Henry’s Law explains the magic: higher pressure allows more oxygen to dissolve into your blood. That extra oxygen is what kickstarts the healing process.
How Pressure Allows Oxygen to Dissolve into Blood Plasma
Under increased pressure, oxygen slips into your blood plasma, not just your red blood cells. That means oxygen reaches areas that normally struggle to get it, especially damaged or inflamed tissues.
Why Just Breathing Oxygen Isn't Enough
Breathing pure oxygen at normal pressure helps, sure, but only to a point. It’s the pressure that supercharges oxygen delivery, turning basic oxygen therapy into a powerful medical treatment.

How Pressurization Feels and What to Expect
The Feeling of Fullness in Your Ears
Nearly everyone feels a gentle fullness in their ears as the pressure rises. It’s the same sensation you get during take-off on a plane. It’s not painful, just noticeable.
How to Equalize the Pressure
Your body adjusts easily. Swallowing, sipping water, chewing gum, or gently pinching your nose and blowing will make your ears pop right back into balance. After that, most people relax and forget about it.
Different Chambers, Different Pressures
High-Pressure (Hard) Chambers for Medical Treatments (2.0 ATA and above)
These steel medical chambers deliver hospital-grade Hyperbaric Oxygen Therapy. They run at higher pressures and are used for serious, clinically approved treatments like radiation injury, carbon monoxide poisoning, and stubborn wounds.
Low-Pressure (Soft) Chambers for Wellness (1.3 – 1.5 ATA)
Soft chambers are built for general wellness, recovery, and inflammation support. They use lower pressure, making them more accessible and comfortable for everyday users who want a boost without needing medical Hyperbaric Oxygen Therapy.

Frequently Asked Questions
Is the pressure inside a hyperbaric chamber dangerous?
Not when used correctly. Pressurised Hyperbaric Oxygen Therapy environments are designed with strict safety systems and are monitored by trained professionals.
Who controls the pressure during a session?
In clinical settings, a certified operator manages it. In soft chambers, the pressure is controlled by built-in regulators that adjust themselves automatically.
Does the pressure stay the same for the whole session?
Mostly yes. The session includes a pressurisation phase, a steady therapeutic phase, and a depressurisation phase, all handled slowly and safely.