CO₂ Gas Injections — A Therapy You Will Not Find Elsewhere
Some medical treatments are so specific to a place that they are worth travelling for. CO₂ gas injections in Marienbad are one of them. In this therapy, natural carbon dioxide from the Maria Spring — one of the purest natural CO₂ sources on Earth — is injected directly beneath the skin. The result is measurably improved blood circulation, pain relief and accelerated tissue healing.
This is not an alternative remedy or a wellness trend. CO₂ gas injections in Marienbad have more than sixty years of clinical use behind them, supported by dozens of published studies confirming their effectiveness.
The Maria Spring: Medical-Grade CO₂ from Nature
What sets Marienbad apart from other spa towns is the Maria Spring (Mariin pramen). This natural gas vent produces carbon dioxide with a purity of 99.7 percent — a figure comparable to industrially manufactured medical gas, yet entirely natural in origin.
Only a handful of places worldwide offer CO₂ of this quality. Marienbad uses this resource for two unique therapies: dry CO₂ baths and the subcutaneous gas injections described here.
How the Procedure Works
The treatment is surprisingly straightforward and takes only a few minutes. A physician or trained nurse injects a small amount of natural CO₂ beneath the skin using a fine needle. The injection site is chosen according to the patient's diagnosis — typically the back, joints, lower limbs or abdominal area.
What to Expect During a Session
- Gas volume: 50–150 ml per injection site, 200–500 ml total per session
- Duration: 10–15 minutes
- Sensation: Mild pressure or a "bubbling" feeling under the skin, which subsides within a few minutes
- Afterwards: No restrictions — patients can immediately continue their daily schedule
The needle is very fine (comparable to an insulin needle), so discomfort is minimal. Most patients describe the sensation as unusual rather than painful. The gas is fully absorbed by the body within 20–30 minutes.
What Happens in the Body
When CO₂ enters the subcutaneous tissue, it triggers a chain of physiological responses that form the basis of its therapeutic effect.
Vasodilation and Improved Circulation
Carbon dioxide causes local widening of blood vessels (vasodilation). The capillaries around the injection site open up, and blood flow increases by two to three times. This effect lasts for several hours after the procedure and accumulates with repeated sessions.
For patients with peripheral vascular disorders, this is significant — increased blood flow means better delivery of oxygen and nutrients to underserved tissue.
Pain Relief
CO₂ provides analgesia through two mechanisms. First, improved circulation carries inflammatory mediators away from the affected area. Second, carbon dioxide directly influences nerve endings and reduces their sensitivity to pain stimuli.
Tissue Oxygenation — The Bohr Effect
Paradoxically, it is carbon dioxide that improves oxygen delivery to tissues. This phenomenon is called the Bohr effect: a higher concentration of CO₂ in tissue causes haemoglobin in red blood cells to release its bound oxygen more readily. The result is better oxygenation precisely where it is needed most.
Accelerated Healing
The combination of improved circulation and higher oxygen levels creates ideal conditions for tissue regeneration. This is why gas injections are also used in post-surgical rehabilitation and in the treatment of chronic wounds.
Indications: When Are CO₂ Gas Injections Prescribed?
Balneologists in Marienbad prescribe CO₂ gas injections for a wide range of conditions:
- Peripheral arterial disease — improving blood flow in the extremities, intermittent claudication
- Diabetic neuropathy and angiopathy — prevention of diabetic foot syndrome, pain reduction
- Chronic pain — back pain, joint disorders, fibromyalgia
- Post-surgical conditions — rehabilitation after orthopaedic procedures, scar treatment
- Skin conditions — psoriasis, chronic ulcers, impaired wound healing
- Raynaud's phenomenon — circulation disorders of the fingers and toes
Gas Injections Versus Dry CO₂ Baths
Both therapies use the same natural CO₂ from the Maria Spring but differ in application and effect.
In a dry CO₂ bath, the patient lies in a sealed bag filled with gas. The CO₂ penetrates the skin and acts systemically — it influences overall circulation and the cardiovascular system.
Gas injections, by contrast, target a specific area. The physician selects the injection site precisely according to the diagnosis: a painful joint, a region with compromised blood flow, or a surgical scar. The CO₂ concentration in the target tissue is considerably higher with injection than with a bath, making the local effect more intense.
In practice, the two methods are often combined. The bath provides a systemic cardiovascular benefit while the injections address a localised problem. The balneologist creates an individualised treatment plan for each patient.
Scientific Evidence
CO₂ gas injections are backed by clinical research, not just tradition. A selection of key findings:
Clinical observations at the Balneological Institute in Marienbad followed patients with peripheral arterial disease through a course of ten treatments. Peripheral blood flow improved substantially, as measured by transcutaneous oximetry, with the effect persisting for several months after completion of the treatment.
Research at Charles University in Prague indicated that patients with diabetic neuropathy experienced meaningful reductions in pain on the visual analogue scale and improvements in nerve conduction velocity after a course of twelve sessions.
A peer-reviewed study in the field of bioclimatology (2020) compared the efficacy of gas injections with conventional physiotherapy for chronic back pain. The CO₂ group showed statistically significantly better outcomes at six-month follow-up.
History of the Therapy in Marienbad
The therapeutic use of natural CO₂ in Marienbad dates back to the nineteenth century, when spa physicians began experimenting with carbonated mineral baths. As early as the second half of the 19th century, spa physicians in Marienbad documented the beneficial effects of local carbon dioxide on the healing of chronic wounds. Subcutaneous gas application developed in the 1960s, when Czech balneologist Dr Karel Hecht systematically described the effects of injected CO₂ on peripheral circulation.
Since then, gas injections have become a standard component of treatment programmes in Marienbad. The town has maintained its unique position thanks to the Maria Spring — a resource that no other European spa can match in quality.
Practical Information for Visitors
How Many Sessions Are Recommended?
A full treatment course comprises 10–12 sessions, ideally every other day. This requires a stay of at least three weeks for the complete series. Some balneologists recommend a shorter intensive course of 7–10 sessions during a two-week stay.
Where Is the Treatment Available?
CO₂ gas injections are available at the Ensana spa hotels in Marienbad, where they are prescribed by a spa physician (balneologist) following an initial medical examination. The treatment is part of the medically supervised spa programmes.
Cost Considerations
For international visitors, CO₂ gas injections are typically included in comprehensive spa treatment packages. Individual sessions are also available at a modest per-treatment cost. Visitors from EU countries may be able to claim partial reimbursement through cross-border healthcare provisions — it is worth checking with your insurer before travelling. For more on planning and costs, see our guide to spa treatment costs.
Contraindications
The treatment is not suitable for patients with acute inflammation at the injection site, decompensated heart failure, severe blood clotting disorders, or during pregnancy. The spa physician makes the final decision on suitability during the initial examination.
A Treatment Worth the Journey
CO₂ gas injections represent one of the most compelling reasons to visit Marienbad for a medical spa stay. Natural carbon dioxide from the Maria Spring, decades of clinical experience and measurable outcomes make this a therapy with few equivalents anywhere in Europe. For patients dealing with circulatory disorders, chronic pain or slow-healing wounds, gas injections offer real, research-supported help — rooted in nature and backed by decades of clinical experience.
