Naftalan Oil Therapy in Azerbaijan: What It Treats, the Evidence, and Who Should Avoid It (2026)

Naftalan oil is a heavy naphthenic crude oil found at the town of Naftalan, about 330 km west of Baku, Azerbaijan. Warmed to 34 to 38°C, it is used in immersion baths for psoriasis and inflammatory musculoskeletal pain. Azerbaijan and Ivanić-Grad, Croatia, are the only two places in the world offering this therapy.

Birtour is a Baku-based DMC that books stays at Naftalan's sanatoriums; we are not a medical provider, and we do not operate any of the properties named on this page. Nothing here is medical advice. Suitability, contraindications, and outcomes are set by each venue's clinical team, not by us; confirm with a physician before booking a course. Prices below are indicative and dated; ask us for a current quote.

Last reviewed: July 2026.

What is naftalan oil?

Naftalan oil is a heavy naphthenic crude oil pumped near the town of Naftalan in western Azerbaijan, about 330 km from Baku. It is about half cycloalkanes, with aromatics, resins, and naphthenic acids making up the rest. Therapeutic bathing in the oil dates to the early 1900s, and a dedicated resort has operated at Naftalan since 1933.

During the Soviet era the resort drew roughly 75,000 visitors a year. Naftalan oil is not unique to Azerbaijan, whatever some resort marketing implies: it is used therapeutically in exactly two places on earth, Naftalan and the Special Hospital Naftalan in Ivanić-Grad, Croatia, which uses a refined derivative of the same oil rather than the Azerbaijani crude. Azerbaijan's government has backed Naftalan as its flagship medical-tourism brand; a September 2024 presidential decree specifically targets increasing the role of Naftalan oil in medical tourism. As of July 2026 the town runs about 14 active properties (naftalanhotels.com), and tourism-board figures suggest roughly half of Azerbaijan's health and wellness facilities sit in Naftalan.

Naftalan oil treatment: what the evidence actually supports

Evidence-supported naftalan oil treatment covers two areas: psoriasis and other dermatoses during remission, and inflammatory musculoskeletal or rheumatic pain. Both rest on uncontrolled clinical experience and small observational studies, not randomized trials. The commonly marketed claim that naftalan treats 70-plus or 75-plus diseases, spanning gynecology, urology, neurology, and infertility, has no trial evidence behind it.

Naftalan does have one randomized controlled trial to its name, but it is easy to miscite. The double-blind RCT identified in the literature treated oral lichen planus and recurrent aphthous stomatitis, not psoriasis or joint disease, and found no significant efficacy difference against a standard steroid, betamethasone. Treat any claim that an RCT proves naftalan treats psoriasis as wrong; the trial that exists answers a different question.

How does naftalan therapy work?

A naftalan course means warm-oil immersion baths, 8 to 15 minutes at 34 to 38°C, usually followed by 15 to 20 minutes of UVA or UVB light and a physiotherapy session. Sanatoriums sell courses in 7, 10, or 14-day blocks, with 14 days the standard length at most properties.

The proposed mechanism draws on in-vitro keratinocyte studies and the oil's naphthenic-acid content, not on a confirmed clinical pathway; sanatorium staff will often describe it in more confident terms than the trial literature supports. A typical booking pairs the daily bath course with full board and other balneotherapy add-ons, such as mud or mineral-water treatments, sold as a package rather than a stand-alone bath.

Is naftalan oil safe?

Naftalan oil therapy carries a manageable safety profile for screened patients, but the safety data has a gap that matters: it covers refined "white" naftalan, not the crude oil most Azerbaijani resorts use in immersion baths. A 1978 University of Zagreb trial on 770 patients found the refined distillate was not carcinogenic; that finding does not automatically extend to crude baths.

Naphthalene, the chemical compound, is classified by the International Agency for Research on Cancer as Group 2B, "possibly carcinogenic to humans." Naftalan oil is a different substance, a complex crude oil rather than a single compound, and the two get confused in casual write-ups. Neither the naphthalene classification nor the 1978 refined-oil study settles the safety question for the crude immersion baths most Naftalan properties run; we have not found a published study that fills that gap, and we would not claim otherwise.

Naftalan oil also has not received full international medical certification as of mid-2026; Azerbaijani authorities have described certification as underway, not complete. Treat any claim that Naftalan therapy is internationally regulator-approved as premature.

Naftalan contraindications: who should not book a course

Naftalan therapy is not appropriate for everyone. Confirmed contraindications include allergy to naftalan or other petroleum products, pregnancy and lactation, active cancer, acute febrile infection, stage 2 to 3 hypertension or severe cardiac disease, and bleeding disorders. Psoriasis patients should book only during remission; the acute, flaring stage is a contraindication, not an indication.

• Petroleum allergy. Naftalan oil is a petroleum derivative; a known allergy to petroleum products rules it out.
• Pregnancy and lactation. Excluded across every source we checked, with no exception noted.
• Active cancer or tumors. Listed as a contraindication in the dermatology literature.
• Acute febrile infection. Wait for the infection to clear before booking a course.
• Stage 2 to 3 hypertension or severe cardiac disease. Warm immersion raises cardiovascular load; screen with a cardiologist first.
• Bleeding disorders. A prudent additional caution for hot immersion bathing; confirm with a physician.
• Psoriasis during an active flare. Indicated only in the stationary or remission stage; contraindicated during the acute, progressive phase.

Every sourced reference we checked tells the same story: screen with a physician before booking, not after arrival. Minimum age for children varies by source, three years in some references and five in others; we state it conservatively and recommend confirming the specific sanatorium's policy for children under five. None of this replaces a conversation with your own doctor, particularly if you take blood thinners or manage a chronic cardiac or renal condition.

Naftalan sanatoriums operating in Azerbaijan (2026)

Roughly 13 properties operate in the town as of July 2026. The table below covers the four most established; rates are the properties' own listed per-night figures, indicative and dated, not net B2B pricing.

What we don't claim

• We don't call naftalan oil a cure. The evidence supports "traditionally used for" and "reported to help" language, not "treats" or "cures."
• We don't quote a single all-in medical price. Naftalan programs bundle room rate and treatment differently by property; we send a current quote once we know your dates and any medical restrictions.
• We don't handle the clinical side. Diagnosis, contraindication screening, and course design are the sanatorium's clinical team's job, not ours.

For operators or families ready to check dates, our DMC quote request guide has the template that gets a fast, accurate answer.