Naftalan Oil Therapy
The Complete Guide

Naftalan is a unique form of crude oil extracted only in the Naftalan region of Azerbaijan. Unlike petroleum used for fuel, naftalan is composed primarily of naphthenic hydrocarbons — over 50% by volume — giving it physical and biological properties not found in any other natural substance on earth.

Its distinctive dark-brown colour and characteristic odour come from these naphthenic compounds, which contemporary research suggests are responsible for the therapeutic effects observed over more than a century of clinical use. The oil is purified to remove light hydrocarbons before medical application, leaving behind the therapeutically active fraction known as deresined naftalan.

The therapeutic use of naftalan dates to the late 19th century, when the local Azerbaijani population observed that bathing in the natural oil springs relieved joint pain and stubborn skin conditions. A German pharmacist, Egor Iegoroff, opened the region's first commercial extraction operation in 1890 and began exporting the oil to Europe.

The first state-run clinical sanatorium opened in Naftalan in 1926. During the Soviet era, the region became one of the most important medical resorts in the USSR, treating over 70,000 patients annually at its peak. Today, eight sanatoriums operate in the region, attended by patients from across Europe, the Middle East, and beyond.

The proposed mechanism of action centres on transcutaneous absorption of naphthenic hydrocarbons during balneological treatment. These molecules are believed to interact with cell membranes, exerting anti-inflammatory and analgesic effects via modulation of prostaglandin pathways and reduction of pro-inflammatory cytokine expression.

Research conducted at the Naftalan Institute of Balneology (Azerbaijan, 2014–2019) and at clinical centres in Croatia (Ivanišević Spa, Daruvar) has documented measurable reductions in inflammatory markers, joint stiffness, and dermatological symptom scores following standard 10–14 day treatment courses.

Naftalan therapy is documented for a range of musculoskeletal, dermatological, neurological, and vascular conditions. The strength of clinical evidence varies considerably by indication.

Naftalan therapy is not appropriate for everyone. The following are absolute contraindications: active malignancy, acute infectious disease, severe cardiovascular insufficiency, decompensated diabetes, severe renal or hepatic impairment, active tuberculosis, pregnancy, and known hypersensitivity to petroleum-derived substances.

Relative contraindications include uncontrolled hypertension, recent surgery, and severe atopic conditions in acute flare. Every prospective patient should obtain medical clearance from their primary physician before booking treatment.

A standard course of treatment lasts 10 to 14 days. Each day, the patient receives a single naftalan bath — typically 8 to 10 minutes in duration, at body temperature (36–38°C). Baths are administered under medical supervision; vital signs are monitored before and after each session.

Adjunct therapies frequently include therapeutic massage, mud applications, mineral water consumption, and physiotherapy. The total programme is designed by the sanatorium's medical staff based on each patient's specific indication and overall condition.

Most patients report a sensation of warmth and mild tingling during their first few baths. Many describe an initial worsening of symptoms — the so-called balneological reaction — typically around days three to five, followed by progressive improvement.

Full therapeutic benefit usually emerges 4 to 8 weeks after the end of the treatment course. Patients are advised to maintain a follow-up consultation with their physician at home and to document outcomes for future reference.

The most robust contemporary evidence for naftalan therapy comes from controlled studies on rheumatoid arthritis, psoriasis, and osteoarthritis of the knee. Smaller observational studies cover ankylosing spondylitis and peripheral vascular disease.

The complete bibliography — including primary clinical sources, review articles, and the original Soviet-era research — is maintained in the Research section of this site.