Kidney Treatment at a Spa — Why Mariánské Lázně?
For more than two hundred years, people with kidney stones, chronic urinary tract infections and post-operative urological conditions have travelled to Mariánské Lázně — known internationally as Marienbad — to drink from its mineral springs. The town sits on a fault system that pushes over forty cold mineral springs to the surface, several of them unusually rich in hydrogen carbonates, calcium and magnesium. This mineral profile shifts urine pH toward the alkaline range, increases natural diuresis and gradually dissolves certain types of kidney stones.
This kidney treatment spa tradition is not a modern invention. The first clinical observations date to the 1820s, when physician Johann Josef Nehr documented patients passing small stones during a three-week cure without surgery. A spa physician can prescribe two or three springs with different mineral compositions, adjusting the plan to each diagnosis. In Karlovy Vary, the springs are hot and sulphate-rich — suited for digestive conditions. In Mariánské Lázně, the cold, hydrogen carbonate-rich springs target the urinary system with a precision validated by generations of practice.
Which Conditions Benefit from the Cure
The most common diagnoses among patients arriving for a urological cure include:
Kidney Stones (Nephrolithiasis)
The drinking cure is most effective for uric acid stones and calcium oxalate stones — the two most common types worldwide. The alkaline mineral water raises urine pH, which reduces the crystallisation of uric acid and helps dissolve existing small stones. Patients with recurrent stone formation benefit particularly from a preventive stay, as the cure resets urinary chemistry for several months after the treatment period.
Chronic Urinary Tract Infections
Recurrent cystitis and chronic pyelonephritis respond well to the increased fluid throughput that the drinking cure provides. Flushing the urinary tract with mineral-rich water several times a day mechanically reduces bacterial colonisation. The magnesium content of certain springs also has a mild anti-inflammatory effect on the mucous membranes of the bladder.
Post-Operative and Post-Lithotripsy States
Patients who have undergone kidney stone surgery, ureteroscopy or extracorporeal shock wave lithotripsy (ESWL) are frequently referred to Mariánské Lázně for recovery. The drinking cure supports the passage of residual fragments and reduces the risk of new stone formation during healing.
Gout, Hyperuricaemia and Chronic Prostatitis
Elevated uric acid levels respond to the alkalising mineral water — the cure lowers serum uric acid and reduces urate crystal deposition in joints and kidneys. Male patients with chronic non-bacterial prostatitis are also treated here with drinking cure, mineral baths and pelvic diathermy, a practice recommended by Czech and German urologists.
The Drinking Cure — Springs, Minerals and Protocol
The drinking cure is the foundation of every urological treatment programme in Mariánské Lázně. Three springs are most commonly prescribed for kidney and urinary conditions.
Rudolf Spring (Rudolfův Pramen)
The Rudolf Spring is the most important spring for urological patients. Rich in hydrogen carbonates with significant calcium and iron, it promotes diuresis and shifts urine pH toward alkaline values. The spring rises in a pavilion near the main colonnade, freely accessible to all visitors.
Caroline Spring (Karolinin Pramen)
The Caroline Spring stands out for its elevated magnesium content. Magnesium plays a key role in preventing calcium oxalate crystallisation — the mechanism behind the most common type of kidney stone. Physicians often prescribe the Caroline Spring in combination with the Rudolf Spring, alternating throughout the day.
Forest Spring (Lesní Pramen)
The Forest Spring has a milder mineralisation and serves as a complementary spring in the drinking plan. It is located inside the Ensana Centrální Lázně hotel building, accessible to Ensana hotel guests and the public during opening hours. Many patients begin their morning round here before walking to the Rudolf or Caroline pavilions.
The Mechanism — How It Works
The therapeutic effect of the drinking cure on the urinary system rests on three physiological processes:
Urine alkalinisation. The hydrogen carbonates act as a natural buffer, raising urine pH from the typical 5.5–6.0 toward 6.5–7.0. In this range, uric acid becomes significantly more soluble and existing uric acid stones begin to dissolve. For calcium oxalate stones, the higher pH reduces new crystal formation.
Increased diuresis. Drinking one to two litres of mineral water per day substantially increases urine volume, diluting stone-forming substances below their saturation threshold. The mechanical flushing also helps move small stones and gravel through the ureters.
Mineral rebalancing. The calcium and magnesium absorbed from the water contribute to healthier mineral balance in blood and urine. Adequate calcium intake actually reduces calcium oxalate stone risk by binding dietary oxalate in the intestine before it reaches the kidneys.
The Daily Regimen
A typical urological drinking cure follows a structured daily plan:
- Morning (6:30–7:30): 200–300 ml from the Rudolf Spring, sipped slowly while walking through the spa park
- Mid-morning (10:00–10:30): 200 ml from the Caroline Spring
- Before lunch (11:30–12:00): 200 ml from the Forest Spring or Rudolf Spring
- Afternoon (15:00–16:00): 200 ml from the Caroline Spring
The total daily intake ranges from 800 ml to 1.5 litres, depending on kidney function and the physician's assessment. The water is always drunk at spring temperature (7–10 °C) and never heated, as warming alters the dissolved gas content.
Beyond the Drinking Cure — Supplementary Treatments
A comprehensive kidney treatment programme typically includes several procedures beyond the drinking cure.
Mineral Baths
Full-body mineral baths using locally sourced spring water promote relaxation and improve peripheral circulation. For urological patients, the warm bath helps relax the smooth muscle of the ureters, facilitating the passage of small stones. Baths are usually prescribed three to four times per week.
CO₂ Gas Baths (Dry Carbon Dioxide Therapy)
In a dry CO₂ bath, the patient sits in a sealed bag filled with naturally occurring carbon dioxide from the Mary Spring. The gas is absorbed through the skin, dilating blood vessels and improving microcirculation — including renal blood flow. More about this treatment is available on the mineral springs page.
Diathermy and Electrotherapy
Short-wave diathermy applied to the lumbar and pelvic region generates deep tissue warmth that reduces chronic inflammation and improves local blood supply to the kidneys. Interferential current therapy and ultrasound are also used for chronic pelvic pain.
Peat Wraps
Although peat therapy is most commonly associated with musculoskeletal conditions, warm peat packs applied to the lower back benefit patients with chronic kidney inflammation by increasing local blood flow and promoting tissue healing.
Clinical Evidence and European Balneology Research
Czech balneological institutes — particularly those affiliated with Charles University in Prague — have documented measurable changes in urine pH, stone recurrence rates and inflammatory markers among patients completing a standard three-week cure.
Research at the Institute of Balneology in Prague suggests that patients with recurrent stones who complete regular annual spa cures may experience a meaningfully lower stone recurrence rate compared with those who do not. Research in German, Austrian and Italian balneology journals has consistently confirmed that hydrogen carbonate-rich mineral waters produce measurable improvements in urinary chemistry within seven to ten days.
Balneotherapy is a recognised medical discipline in the Czech Republic, Germany and Austria. Spa physicians in Mariánské Lázně hold standard medical degrees with specialisation in physical medicine and balneology.
Practical Information for International Visitors
How Long Should You Stay?
The traditional urological cure lasts three weeks (21 days). Measurable changes in urine chemistry appear after seven to ten days, and the full effect — stone dissolution and sustained pH shift — requires the remaining period. A two-week stay offers meaningful benefit but is considered shortened. Stays under one week are too brief for a therapeutic drinking cure. More on cure durations is available in the spa treatment guide.
Insurance and Self-Pay Options
For international visitors, coverage varies:
- German and Austrian patients may have partial coverage through their Krankenkasse with a referral from their urologist. EU cross-border healthcare provisions can apply, though reimbursement processes differ between insurers.
- Self-pay patients can book directly. A three-week urological cure — accommodation, physician consultations, drinking cure plan and supplementary treatments — typically costs EUR 1,800 to 3,500 depending on hotel category and treatment intensity. The Ensana spa hotels offer packages that include medical supervision.
- Travel insurance generally does not cover planned spa treatment, only emergency care.
For details on costs and what to expect, see the practical information page.
What to Bring
Pack comfortable walking shoes and a reusable water bottle or traditional porcelain spa cup. Bring recent medical reports, ultrasound results and laboratory findings from your urologist — the spa physician will use these to design your treatment plan.
The Historical Tradition — Kidney Treatment Since the 19th Century
When Abbot Karl Kaspar Reitenberger opened the springs to the public in the early 19th century, one of the first documented medical applications was the treatment of "gravel and stone disease" — the contemporary term for kidney stones.
By the 1860s, Marienbad had established itself alongside Vichy (France) and Fiuggi (Italy) as one of the three great European spa towns for urological conditions. German, Austrian and Russian physicians sent their patients here specifically for the Rudolf Spring cure. This tradition survived two world wars and the nationalisation era. Today, the medical infrastructure is modern, the springs are unchanged, and the clinical knowledge has been refined over two centuries of continuous practice.
Why Mariánské Lázně — The Unique Advantage
Several factors make this town uniquely suited for kidney and urinary tract treatment:
Spring diversity. No other European spa town offers as many chemically distinct cold mineral springs within walking distance. A spa physician can combine an alkalising spring, a magnesium-rich spring and a milder hydration spring in a way that is not possible where only one or two sources are available.
Cold springs. Unlike the hot springs of Karlovy Vary or Baden-Baden, Mariánské Lázně's springs emerge at 7–10 °C. Cold mineral water retains more dissolved CO₂ and certain minerals, enhancing the diuretic and alkalising effect.
Natural CO₂. Pure natural carbon dioxide for dry gas baths adds a vascular therapy component that complements the drinking cure — a combination available in very few places worldwide.
Integrated medical care. The Ensana spa hotels — Ensana Centrální Lázně, Ensana Nové Lázně and others — operate under medical supervision with spa physicians, laboratory diagnostics and a full range of balneological treatments on site. The drinking cure from the Rudolf and Caroline springs is part of the daily programme, with the Forest Spring accessible in the Ensana Centrální Lázně hotel lobby.
UNESCO heritage setting. The spa park, colonnades and forest trails where patients walk between springs are part of a UNESCO World Heritage Site. The therapeutic landscape — altitude, forested hills, clean air — contributes to recovery in ways that a clinical setting cannot replicate.
For anyone dealing with recurrent kidney stones, chronic urinary problems or post-surgical recovery, Mariánské Lázně offers what modern medicine alone cannot: a place where geology, tradition and clinical expertise converge to help the body heal through the water rising from the earth beneath your feet.
