Sowa Rigpa

Sowa Rigpa (Tibetan: གསོ་བ་རིག་པ, Wylie: gSo ba Rig pa, "science of healing") is the Himalayan medical tradition practised in Bhutan, Tibet, Mongolia, Ladakh, Sikkim, Nepal and adjacent regions. In Bhutan it is one of the two official components of the national health system, delivered alongside biomedicine through a single public infrastructure and free of charge at the point of use. Practitioners, known as drungtsho (སྨན་པ་དྲུང་འཚོ, physicians) and menpa (སྨན་པ, clinical assistants), are salaried civil servants deployed through the Department of Traditional Medicine Services under the Ministry of Health.^[1]

The system is built on the rGyud bzhi (Four Tantras), a medical treatise traditionally attributed to Yuthog Yonten Gonpo the Elder (8th century) and revised by Yuthog Yonten Gonpo the Younger in the 12th century. It conceptualises health as dynamic balance among three humours — rlung (wind, རླུང), tripa (bile, མཁྲིས་པ) and beken (phlegm, བད་ཀན) — operating through five elements, channels and subtle winds. Diagnosis rests on four methods: visual inspection, pulse reading, urinalysis and questioning.^[2]

Historical background

Medical practice in Bhutan long predates the modern state. For centuries care was provided by monastic physicians, lay practitioners from hereditary lineages and court physicians attached to the Wangchuck monarchy. Knowledge circulated through Tibetan textual transmission from the great medical colleges of Chakpori and Mentsikhang in Lhasa, supplemented by local knowledge of Himalayan flora. A formal state role for traditional medicine began under the Third King, Jigme Dorji Wangchuck, who in 1967 directed the Department of Health to establish a traditional medicine service both to deliver care and to preserve Bhutanese cultural heritage.^[3]

An Indigenous Dispensary opened on 28 June 1968 at Dechencholing in Thimphu, staffed initially by physicians trained in Tibet. It moved to its present Kawangjangsa site in 1979 as the National Indigenous Hospital, was renamed the National Institute of Traditional Medicine in 1988, and upgraded to the Institute of Traditional Medicine Services (ITMS) in 1998. Subsequent reorganisation placed clinical services under the Department of Traditional Medicine Services (DTMS), training under the Faculty of Traditional Medicine at KGUMSB, and pharmaceutical production under Menjong Sorig Pharmaceuticals Corporation Limited.^[4]

Theoretical framework

Sowa Rigpa describes the body through three nyepa (humours). Rlung governs respiration, movement, nerve function and mental activity; tripa governs digestion, metabolism and body heat; beken governs structure, lubrication and stability. Each person has a constitutional mixture of the three, and disease is read as disturbance of that balance. Underlying causes are traced to the three mental poisons of Buddhist psychology: ignorance, attachment and aversion. The body is further analysed through seven bodily constituents (nutritional essence, blood, flesh, fat, bone, marrow, reproductive fluid), three excreta and a network of channels carrying subtle winds.^[2]

The rGyud bzhi and its Bhutanese transmission

The rGyud bzhi is organised into four tantras: the Root Tantra (rTsa rgyud) summarising the whole system; the Explanatory Tantra (bShad rgyud) on anatomy, physiology and pharmacology; the Instructional Tantra (Man ngag rgyud) on the diagnosis and treatment of disease; and the Subsequent Tantra (Phyi ma rgyud) on pulse, urine and compounding. Bhutanese physicians study these texts in classical Chökey (Choke) alongside Dzongkha commentaries. The curriculum at the Faculty of Traditional Medicine is structured around the four tantras, mirroring the organisation of classical medical colleges in Tibet and Ladakh.^[5]

Diagnosis and treatment

Pulse diagnosis (rtsa brtag) is read at the radial artery of both wrists with the index, middle and ring fingers, giving twelve positions mapped to specific organs. Quality is described through metaphors such as "rolling pearl" or "pecking crow". Urinalysis examines colour, odour, foam, sediment and the film that forms on the sample as it cools. Visual inspection focuses on the tongue, eyes, skin and general bearing, and interrogation covers diet, behaviour, sleep, emotional state and history.^[6]

Treatment is ordered from least to most invasive: dietary adjustment (zas), behavioural change (spyod lam), medicines (sman) and external therapies (dpyad). External therapies include moxibustion (me btsa), cupping, bloodletting (gtar ga), golden needle therapy, herbal compresses and medicinal baths (lum). Hot-spring bathing at tshachu sites such as Gasa and Chubu is used for musculoskeletal, skin and chronic conditions and is also a cultural practice of long standing.

Institutional structure

The National Traditional Medicine Hospital at Kawangjangsa in Thimphu functions as the tertiary referral facility and teaching hospital for Sowa Rigpa in Bhutan. Traditional medicine units (TMUs) are co-located with biomedical hospitals at district and sub-district level. By the end of 2001 TMUs were operating in all twenty dzongkhags. A 2019 nationwide survey recorded 66 TMUs staffed by 53 drungtsho and 113 menpa, with units present at district hospital, basic hospital and some basic health unit levels.^[7]

Three linked organisations carry the sector. The Department of Traditional Medicine Services runs clinical delivery. The Faculty of Traditional Medicine at KGUMSB runs education and research. Menjong Sorig Pharmaceuticals Corporation Limited produces medicines. The pharmacy unit originated inside the Thimphu hospital in 1978, was formally established as a WHO-funded Pharmaceutical Research Unit in 1982, renamed Menjong Sorig Pharmaceuticals, and corporatised in January 2017 under the state holding company Druk Holding and Investments.^[4]

Training

The Faculty of Traditional Medicine (FoTM) at the Khesar Gyalpo University of Medical Sciences of Bhutan is the only institution in the country that trains Sowa Rigpa practitioners. The Bachelor in Traditional Medicine (drungtsho) programme runs for five years and six months after class 12, with an annual intake of eight students. Instruction is delivered in Dzongkha and Chökey. Graduates sit registration with the Bhutan Medical and Health Council and are placed by the Royal Civil Service Commission. A separate three-year diploma trains menpa, who serve as clinical assistants and medicine compounders in TMUs and rural outposts.^[5]

Pharmacopoeia and production

Menjong Sorig Pharmaceuticals manufactures roughly a hundred standardised formulations — pills, powders, decoctions, syrups, oils and medicated butters — using plant, mineral and some animal ingredients. Raw materials are drawn from Bhutan's altitudinal range, which extends from subtropical lowlands under 200 metres to alpine zones above 4,000 metres and supports a large share of the species listed in the classical pharmacopoeia. Collection is carried out by designated communities in high-altitude areas such as Lingzhi and Laya and is regulated under sustainable harvesting guidelines issued by the Ministry of Health and the Department of Forests and Park Services.^[8]

Quality assurance is a recognised area of development. Unlike single-compound pharmaceuticals, Sowa Rigpa preparations are complex multi-ingredient formulations whose full chemistry is not characterised. Menjong Sorig has introduced standardised sourcing, batch processing and finished-product testing, and has collaborated with external researchers on phytochemical profiling and GMP-style controls, but analytical capacity remains constrained relative to modern pharmaceutical manufacturing.^[2]

Integration with biomedicine

Bhutan's dual-track system places Sowa Rigpa and biomedicine inside a single public health infrastructure. District hospitals typically have both a biomedical wing and a TMU, and patients choose freely between them or use both. Referral between the two is informal rather than protocol-driven: biomedical clinicians may refer chronic musculoskeletal, digestive or stress-related cases to drungtsho, while drungtsho refer surgical, emergency and diagnostic imaging cases back to biomedicine. There is no shared electronic record system and no formal combined-treatment protocol; integration is institutional and financial rather than clinical. Researchers and the World Health Organisation have pointed to Bhutan as an example of state integration of a traditional system, while also noting the limits of operational coordination.^[9]

Contemporary challenges

Sustainability of medicinal plants is among the most pressing pressures on the system. Rising demand, habitat change and warming of alpine zones affect the availability of key high-altitude species. Menjong Sorig and the Faculty of Traditional Medicine have piloted cultivation of selected herbs and maintain medicinal plant gardens, but most raw material is still wild-harvested. Climate-driven shifts in the distribution of alpine flora are documented in the Eastern Himalayas and have direct implications for the Bhutanese pharmacopoeia.^[10]

Other challenges include expanding peer-reviewed clinical trials, formalising pharmacovigilance for concurrent use of traditional and biomedical drugs, regulatory registration of products for export, and retaining drungtsho in public service as private practice opportunities grow in the region. Independent researchers also note that documentation of Sowa Rigpa in Bhutan has been largely produced by the institutions that deliver it, and that external clinical evidence on efficacy is still limited.^[2]

International recognition

The WHO Traditional Medicine Strategy 2014–2023 cited Bhutan as an example of state integration of a traditional system, and Bhutan participates in WHO and regional programmes on traditional medicine standards. In 2018 UNESCO inscribed "Lum medicinal bathing of Sowa Rigpa" — a specific therapeutic practice of the Tibetan people in China — on the Representative List of the Intangible Cultural Heritage of Humanity. As of early 2026, Sowa Rigpa as a whole has not been inscribed on the UNESCO list under a joint nomination. India, Bhutan, Mongolia and Nepal recognise Sowa Rigpa as an official medical system, and political disputes over the heritage status of the tradition between India and China have delayed broader multilateral inscription.^[11]