# svedana (स्वेदन)

> Canonical version of this page: https://nighantu.ageayurveda.com/lexicon/svedana/

An Ayurvedic technical term, rendered into English in 7 different ways.
The renderings do not agree, and the difference between them changes what the term is taken
to mean.

## Identification

| Field | Value |
| --- | --- |
| Transliteration | svedana |
| Devanagari | स्वेदन |
| Also written | svedanam, svedana-karma, swedana, sveda, sveda-karma, sudation |
| Category, as gathered | chikitsa-3 |
| Grouped under | Examination and treatment |
| Classical citations | 4 |
| Citations checked | 2026-10-07 |

## How it is translated, and whether the translation holds

Each rendering is given with the source that uses it. The assessment is ours.

### Fomentation

WHO International Standard Terminologies on Ayurveda (2022) · ITA-9.2.36 svedana, PDF p.438 (no description text under this entry); the six-modality list ITA-9.1.42 names 'svedanam' among the ṣaḍvidhopakramāḥ · comparator

Comparator. 'Fomentation' is the English chosen; WHO's own entry carries no definition. I did not find a dedicated 9.1 'svedanam' therapy entry in my text extraction.

Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that
licence permits, and deliberately absent from the downloadable dataset, which is CC BY 4.0.

### Sudation of mercury

WHO International Standard Terminologies on Ayurveda (2022) · ITA-7.2.5 svedanam (rasashastra chapter) · comparator

Homonym: the same word names a mercury-processing step. Relevant for disambiguation.

Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that
licence permits, and deliberately absent from the downloadable dataset, which is CC BY 4.0.

### 'substances used for swedan (sudation)' (svedanaṁ, DG0342); 'one of the process applied in purification/refining of the material' (svedana, RS0232); 'Sweat, perspiration. Mala of Meda Dhātu' (sveda, SK0194)

NIA/WHO-APW draft 'Standardization of Non-Clinical Terminologies of Ayurveda' (rvpganagpur.com PDF) · DG0342, RS0232, SK0194 · comparator (draft)

Draft; shows the three senses (therapy, rasashastra process, sweat-as-mala).

Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that
licence permits, and deliberately absent from the downloadable dataset, which is CC BY 4.0.

### Swedana (untranslated); 'Swedana (fomentation, &c., for promoting perspiration)'; 'swedyas (diaphoretics)'

Kaviratna, Charaka-Samhita · Lesson XXII pp.244-249; Chikitsa Grahani chapter; Vimanasthana Lesson VIII p.405 · public-domain translator

Kaviratna transliterates; his glosses lean on 'perspiration'.

### 'Sveda (calorification, fomentation, diaphoretic measures, etc.)'; chapter title 'Description of Sveda (fomentation, calorification, etc.)'

Bhishagratna, Sushruta Samhita Chikitsasthana ch. XXXII · Su.Chi.32 section 2 and title · public-domain translator

Bhishagratna hedges with three words and explains why in a footnote (see classical).

### sudation / sudation therapy / steam therapy

textbook and web usage (Wikipedia 'Svedana'; PubMed PMIDs 23723649, 38361501 'sudation') · https://en.wikipedia.org/wiki/Svedana ; PubMed abstracts · textbook · our paraphrase of the source, not its words

'Sudation' is the dominant Indian academic rendering; 'steam therapy' is a popular narrowing.

### 'poultice (Upanaha Sweda)'; 'Swedana (fomentation)'

PubMed PMID 33281392; PMID 42748372 · titles/abstracts · modern literature

Research English uses sub-type names with English glosses.

## The classical passages

### Charaka Samhita Sutrasthana 22:Standard 22.11 second half; Kaviratna prints '7-9' after the six-definition block, checked against the source

> Kaviratna: "Anything that produces perspiration and destroys stiffness and heaviness and sensation of cold is said to be Swedana." Sanskrit: "स्तम्भगौरवशीतघ्नं स्वेदनं स्वेदकारकम्||११||"

tr. Kaviratna; Sanskrit carakasamhitaonline · https://archive.org/download/BIUSante_47357/BIUSante_47357_djvu.txt ; https://www.carakasamhitaonline.com/index.php/Langhanabrimhaniya_Adhyaya

Charaka's definition: svedana produces sveda and removes stambha (stiffness), gaurava (heaviness) and shita (cold).

### Charaka Samhita Sutrasthana 22:Standard 22.16; Kaviratna's printed number OCR'd as 'f1*' (footnote mark plus number, presumably 14), checked against the source

> Kaviratna: "Such things as are warm, pungent, unstable, oily, dry, subtile, liquid, stable and heavy, are generally said to be Swedana." Sanskrit: "उष्णं तीक्ष्णं सरं स्निग्धं रूक्षं सूक्ष्मं द्रवं स्थिरम्| द्रव्यं गुरु च यत् प्रायस्तद्धि स्वेदनमुच्यते||१६||"

tr. Kaviratna · https://archive.org/download/BIUSante_47357/BIUSante_47357_djvu.txt ; https://www.carakasamhitaonline.com/index.php/Langhanabrimhaniya_Adhyaya

Qualities of svedana substances (hot, sharp, mobile, unctuous, dry, subtle, liquid, stable, heavy). Kaviratna's number not legible in OCR; standard number verified.

### Sushruta Samhita Chikitsasthana 32 (Svedavacharaniya):Bhishagratna section 2; Sanskrit verse 32.3 per siva.sh edition, checked against the source

> Bhishagratna: "Sveda (calorification, fomentation, diaphoretic measures, etc.) may be divided into four groups such as, the application of direct heat (Tapa-sveda), fomentation (Ushma-sveda), poulticing (Upanaha sveda) and the application of heated fluids (Drava-sveda). All kinds of diaphoretic measures (Sveda) belong to one or the other of these groups. 2." Sanskrit 32.3: "चतुर्विधः स्वेदः; तद्यथा- तापस्वेद, ऊष्मस्वेद, उपनाहस्वेदो, द्रवस्वेद इति; अत्र सर्वस्वेदविकल्पावरोधः ॥३॥"

tr. Bhishagratna · https://www.wisdomlib.org/hinduism/book/sushruta-samhita-volume-4-cikitsasthana/d/doc142949.html ; https://www.siva.sh/sushruta-samhita/chikitsa-sthana/32/1-5

Sushruta's fourfold classification (tapa, ushma, upanaha, drava).

### Charaka Samhita Sutrasthana 14 (Svedadhyaya):whole chapter

**Quotation withheld:** nobody has yet read this quotation against its printed source, and an unchecked quotation is not published here. The passage is at https://archive.org/download/BIUSante_47357/BIUSante_47357_djvu.txt ; https://www.carakasamhitaonline.com/index.php/Swedadhyaya

Location of Charaka's dedicated svedana chapter (Kaviratna Lesson XIV; carakasamhitaonline 'Swedadhyaya'). Content (types, contraindications, signs) not extracted here.

## Not to be confused with

- **sveda (sweat).** The mala of meda dhatu (NIA draft SK0194); svedana is the procedure that induces/applies heat. Same stem, different referent.
- **svedana of mercury (rasashastra).** WHO ITA-7.2.5 'Sudation of mercury' is a pharmaceutical processing step, not a therapy on a patient.
- **diaphoresis.** Bhishagratna's note: sveda 'may be to cause or not to cause perspiration'; sweating is a common sign, not the definition.
- **snehana.** The preceding upakrama; classically paired (snigdha-svinna) before shodhana, but distinct in definition and qualities (Su.22.11, 15-16).
- **stambhana.** Defined as its contrary in Su.22: svedana destroys stambha; stambhana arrests flow and is used after excess sveda.

## Renderings that do not hold

- steam therapy / steam bath. Only one sub-type (ushma/bashpa); Sushruta's tapa, upanaha and drava sveda involve no steam.
- diaphoretic therapy. Makes sweating the aim; Bhishagratna's own note and the Charaka definition make stambha-gaurava-shita removal the aim, with sweat as marker.
- fomentation. In English medical usage fomentation is a local warm compress; svedana includes whole-body chambers and heated beds (Su.Chi.32.5).

## Open questions

Recorded rather than resolved.

- Charaka Su.14's list of sveda types (commonly said to be thirteen) and its contraindication list were located but not verified against Sanskrit here.
- The WHO ISTA chapter 9.1 may contain a separate 'svedanam' therapy entry that my text extraction missed; only 9.2.36 'Fomentation' was found.

## Citation

Age Ayurveda Nighantu, "svedana", https://nighantu.ageayurveda.com/lexicon/svedana/, CC BY 4.0.
Whole lexicon: https://nighantu.ageayurveda.com/lexicon.json and https://nighantu.ageayurveda.com/lexicon.csv.

Educational reference only. A term entry explains what a word means and how it has been
translated. Nothing here is advice.