Charaka Samhita Part 3: Sutrasthana Chapter 3 (Aragvadhiya Adhyaya) — Ancient Herbal Pastes for Skin Disease, Itching and Healthy Skin

📖 22 min read · Part 3 of the Charaka Samhita Series

Why a Whole Chapter on Pastes?

The Sutrasthana does not march in a straight line from theory to therapy; it moves in widening circles, returning to the same body from different sides. Chapter 1, the Dirghanjiviteeya Adhyaya, laid down first principles — the definition of health, the three doshas, the law of similarity and difference. Chapter 2 turned inward, to the cleansing herbs and medicated gruels that prepare the gut for treatment. Now Chapter 3 turns the body over and looks at its outermost layer: the skin.

This is the first chapter of the Charaka Samhita that reads less like a philosophy lecture and more like a working physician's notebook. There is little argument in it and a great deal of practice. Page after page records recipes — this herb with that liquid, ground in this way, smeared on the body for that complaint. For anyone who has ever wondered what an Ayurvedic clinic of two thousand years ago actually did, the Aragvadhiya Adhyaya is one of the clearest windows we have.

Its subject is external treatment (bahya chikitsa, बाह्य चिकित्सा) — medicine you apply rather than swallow. The skin, in the classical view, is not a passive wrapper but a living organ that both reveals inner imbalance and responds to treatment directly. A great many of the complaints the chapter addresses are skin diseases, but its pastes also reach beneath the surface to calm aggravated Vata, soothe gout, quiet a throbbing head and cool a body burning with heat. By the end, what looks like a list of recipes turns out to be a small but complete system of topical medicine.

Why give the skin a whole chapter? Because in the Ayurvedic view the skin is an organ in its own right, not merely a wrapper. It is the seat of the sense of touch (sparshanendriya), it is one of the body's routes for clearing waste through sweat, and its colour and texture are read as a daily report on the state of the doshas within. When the inner state is disturbed, the skin is often where that disturbance first becomes visible. Treating it directly — cooling a heat that shows as redness, drying a damp that shows as oozing — is therefore not superficial care but a way of reaching the body through its largest and most accessible surface.

Aragvadhiya: The Name and the Golden Tree (Aragvadha)

Classical chapters take their names from their first important topic, the way we might title a file by its opening line. This one is named for a tree. Aragvadha (आरग्वध) is Cassia fistula — the golden-shower tree, known across India as amaltas, the one that hangs the roadsides with chains of yellow flowers each summer. The chapter that opens with its leaves is therefore called the Aragvadhiya Adhyaya, "the chapter concerning Aragvadha."

The name is a signpost to the theme. Aragvadha was prized in the classical pharmacy as a gentle purgative and, crucially for this chapter, as a herb for the skin. The Charaka Samhita records a paste of fresh aragvadha leaves ground with kakamaci (black nightshade) leaves for skin disorders: the body is first smeared, then the affected areas are anointed with the leaf paste (Charaka Samhita, Sutrasthana 3.17). The tree that names the chapter is also one of its remedies.

Placed third among the thirty chapters of the Sutrasthana, the Aragvadhiya sits early in the section the tradition treats as the "summary" of all Ayurveda. Its position is telling. Before the text has finished laying out grand principles, it pauses to hand the reader something they can hold and use. A physician of the ancient world did not only need to understand the doshas; they needed to know what to put on a patient's itching, weeping skin tomorrow morning. Chapter 3 is that answer, written down.

What Is a Lepa? The Ayurvedic Art of Medicated Pastes

To follow this chapter, it helps to know its basic dosage form. A lepa (लेप) is a medicated paste applied to the skin. The method is simple and unchanged after two millennia: take herbs, minerals or both; reduce them to a powder; mix that powder with a liquid into a smooth paste; and spread it over the body or the affected part. A thicker, more generously applied version is sometimes called a pradeha (प्रदेह). When the paste is built on a fat — oil or ghee — and cooked, it becomes a medicated oil or taila.

What turns a paste from a poultice into a precise instrument is the choice of liquid, the vehicle that carries the herbs into the skin. The Aragvadhiya chapter rings the changes on this choice with real intent. Skin formulations are ground with buttermilk (Sutrasthana 3.8–9), with cow's urine (Sutrasthana 3.13), with sour vinegar (Sutrasthana 3.15–16, 3.18) or with pungent mustard oil (Sutrasthana 3.12). Pastes meant to cool a burning body are instead bound with soothing ghee (Sutrasthana 3.26–27). The same herb in a different vehicle becomes a different medicine — a sharp, drying, anti-microbial wash in vinegar; a calming, lubricating salve in ghee.

The chapter even gives a kind of base recipe for a medicated paste-oil. A group of drugs is impregnated with the bile of an ox, ground together, and prepared with the oil of mustard into a paste or tailam (Sutrasthana 3.3–7). To a modern reader, ox bile and mustard oil sound exotic; to the classical physician they were a fat-and-emulsifier system for driving active herbs through the oily barrier of the skin — not so different in intent from the carrier bases of a modern ointment.

Two practical instructions recur and are worth keeping in mind as we read the formulas. First, the skin is often smeared with oil before the powder or paste is applied, so the medicine grips and the skin is not stripped raw (Sutrasthana 3.10–11, 3.17). Second, many of these preparations are powders kept dry and dusted on rather than wet pastes — the ancestor of the medicated dusting powder still sold today. The chapter, in other words, already distinguishes between a wet application and a dry one and chooses between them by condition.

One more practical detail shapes how a lepa behaves: how thickly it is laid on and how long it is left to act. A thin wash that is soon rinsed gives a mild, cooling touch; a thick paste left to dry on the skin pulls and tightens as it hardens, drawing oil and moisture out of the pores — which is why a drying clay pack feels so different from a splash of rosewater. The chapter's instruction to smear first and then anoint is an early recognition that the same ingredients act differently depending on preparation and contact time. None of this needs a laboratory to observe; it needs only an attentive physician, which is exactly what the chapter assumes its reader to be.

Pastes for Skin Disease (Kushtha), Itching (Kandu) and Eczema

The core of the Aragvadhiya Adhyaya is its treatment of skin disease. In the classical texts these conditions are gathered under the broad heading kushtha (कुष्ठ) — not leprosy alone, as the word is sometimes mistranslated, but a wide family of skin disorders marked by discolouration, itching, eruptions, scaling and oozing. (Sushruta's own classification of these diseases is laid out in his Nidana Sthana, a useful companion to this chapter.) Charaka's response here is almost entirely external, and remarkably systematic.

The chapter's signature skin formula is a powder of bitter, astringent and antiseptic herbs ground with buttermilk: kustha, both kinds of turmeric (haridra), tulsi, patola, neem (nimba), ashwagandha, devadaru, shigru (drumstick), white mustard, tumburu, coriander, mustaka and sandalwood (candana), powdered together and worked into a paste with buttermilk (Sutrasthana 3.8–9). Read that list against a modern label and the logic is plain — neem and turmeric for their antiseptic action, sandalwood and coriander to cool, mustard and kustha to penetrate and dry. It is a broad-spectrum skin paste built from the kitchen and the garden.

For the intensely itchy, spreading complaints, the text turns to a dry dusting powder. A combination of kustha, tuttha (copper sulphate), daruharidra (tree turmeric), kasisa, kampillaka, musta, lodhra, sulphur, rala, vidanga, realgar, orpiment and the bark of karavira is powdered and dusted onto skin that has first been smeared with oil; the text says it relieves ringworm, itching (kandu, कण्डू), kitibha, papular eruptions and eczema (Sutrasthana 3.10–11). This is one of the most precise therapeutic claims in the chapter, naming specific conditions and a specific delivery method.

From there the chapter offers a sequence of alternative pastes for skin disorders, each a small variation on the theme:

• A paste of realgar, orpiment and pepper (marica) in mustard oil, mixed with the latex of the arka plant; and a second of copper sulphate, vidanga, marica, kustha, lodhra and realgar (Sutrasthana 3.12).
• Rasanjana (a collyrium-like extract of tree turmeric) with the seed of cakramarda (a herb still used for ringworm) and the juice of kapittha; and a paste of kanja seed, cakramarda and kustha ground in cow's urine (Sutrasthana 3.13).
• An alkali (kshara) prepared from sesamum (Sutrasthana 3.14), and a cooked semi-solid of karavira roots with tusodaka vinegar and the juice of burnt palasa roots (Sutrasthana 3.15–16).
• And the chapter's namesake leaf pastes: fresh aragvadha and kakamaci leaves, and separately fresh karavira leaves, ground and applied after the skin is first smeared (Sutrasthana 3.17).

Notice what this sequence tells us about ancient practice. The physician was not handed a single cure-all; they were handed a graded set of options to rotate through as one failed or as the disease changed. Notice, too, the repeated appearance of cakramarda for ringworm — a herb (Cassia tora) that modern pharmacology has since found to carry genuine antifungal compounds. The chapter is empirical medicine, recorded honestly as a list of things that worked.

Even the liquids in these skin pastes are chosen with care rather than at random. Buttermilk is mildly sour and slightly acidic, which helps loosen scaling and discourages the microbes that thrive on damp skin, and it cools as it dries. Cow's urine, used here as a grinding medium, is sharp and antiseptic and was one of the classical pharmacy's standard vehicles for stubborn skin complaints. Vinegar carries the same sour, penetrating quality in stronger form. Read this way, the chapter is not merely listing herbs — it is pairing each herb group with a liquid whose qualities push the medicine in the intended direction: drying and disinfecting for weeping eruptions, cooling and soothing for inflamed ones.

The pastes of this section, summarised by what they were meant to do:

Because so many of these herbs — neem above all — remain the backbone of Indian skincare, it is worth reading our standalone guide to neem's twelve Ayurvedic uses for skin and hair alongside this chapter; Charaka's nimba and the neem in a modern face wash are the same leaf, used for the same reasons.

The Herbs and Minerals Behind the Pastes

Step back from the individual recipes and a small, repeating cast of ingredients comes into focus. Understanding what each one brought to a paste is the difference between reading the chapter as a museum label and reading it as medicine.

On the botanical side, a handful of plants do most of the work. Neem (nimba) and the two turmerics — culinary haridra and the more bitter tree turmeric daruharidra — are the antiseptic and anti-itch core. Kustha (the root of Saussurea) is the great penetrant of skin formulas, appearing in formula after formula. Sandalwood (candana), lodhra and manjistha cool inflamed, reddened skin and were believed to even out complexion. Vidanga is the anti-parasitic; cakramarda the specific for ringworm. Many of these same herbs are exactly what you would find in a traditional ubtan today, which is no accident — the household ubtan is the lineal descendant of Charaka's lepa.

It is worth pausing on how many of these plants modern research has since taken seriously. Neem's antibacterial and antifungal activity, turmeric's anti-inflammatory curcumin, the antifungal compounds isolated from cakramarda, the astringent tannins of lodhra — the pharmacology arrived centuries later, but the empirical observation that these particular plants helped these particular skin complaints was recorded here, in a working clinic, long before anyone could name a single molecule. That does not make every classical claim correct, but it does mean the chapter deserves to be read as careful observation rather than folklore.

On the mineral side, the chapter is frank about using substances that we now treat with great caution. Tuttha (copper sulphate), kasisa (green vitriol), realgar and orpiment (the arsenic sulphides), and sulphur (gandhaka) all appear in the dusting and paste formulas (Sutrasthana 3.10–12). In small, externally applied, properly purified quantities these were powerful anti-microbial and keratolytic agents — sulphur, for instance, is still used in dermatology for scabies and certain fungal complaints. But this is precisely where the gap between the ancient clinic and the modern kitchen is widest.

The presence of these mineral drugs also tells us something about the sophistication of the system. The classical physician already understood that processing changes a substance — that a raw mineral and a purified one are not the same medicine — and built whole procedures (shodhana) around the idea. That instinct, that what you do to a drug matters as much as the drug itself, is one of the most genuinely scientific habits in the entire text.

Beyond Skin: Vata, Gout (Vatarakta) and Headache (Shiroroga)

Having dealt with the skin, the chapter does something quietly clever: it keeps the same external method — the paste — but aims it at deeper complaints. The reasoning is consistent with the law of similarity and difference from Chapter 1. If a disorder is cold, dry and mobile (the signature of aggravated Vata, वात), you oppose it with paste that is warm, oily and stabilising.

So the Vata pastes are built on warming, unctuous, sour materials. One combines badara, kulattha (horse gram), devadaru, rasna, black gram, linseed, castor and other oily seeds, kustha, vaca, satapuspa and barley powder, mixed with vinegar and warmed (Sutrasthana 3.18). Another, simpler version pastes kustha, satapuspa, vaca and barley powder with oil and vinegar (Sutrasthana 3.20). The chapter even prescribes a warm vesavara — a savoury preparation of the meat of marshy animals and fish — applied externally for Vata, and praises a paste of the four fats (ghee, oil, muscle-fat and marrow) with the ten roots (dashamula) and aromatic drugs as a "destroyer of Vata" (Sutrasthana 3.19). Heat, oil and weight, laid against cold, dry lightness.

Then comes a striking shift. For vatarakta (वातरक्त) — the condition of "Vata and blood," recognisable in much of its description as gout and inflammatory arthritis — the pastes turn sweet and cooling rather than hot. Because vatarakta carries a fiery, blood-borne component, heating it would make it worse. So the chapter prescribes both kinds of satapuspa, madhuyasti (liquorice), madhuka, bala, priyala, kaseruka and vidari, with ghee and sugar candy (Sutrasthana 3.21); a paste of milk and ghee finished with honey (Sutrasthana 3.22); and wheat powder with goat's milk and ghee (Sutrasthana 3.23). The contrast with the Vata pastes a few lines earlier is deliberate and instructive: same disease-family root, different heat, opposite remedy.

Finally the chapter offers relief for the head. For headache (a shiroroga, शिरोरोग), it gives a fragrant, cooling paste of tagara, utpala (blue lotus), sandalwood and kustha with ghee, to be applied to the head (Sutrasthana 3.24), followed by a warm application of sugar candy, ghee and oil (Sutrasthana 3.25). Anyone who has pressed a cool sandalwood paste to an aching forehead on a hot afternoon has, without knowing it, practised Sutrasthana 3.24.

What makes this stretch of the chapter so instructive is its discipline. The physician does not reach for the same comforting warm oil every time something hurts. A cold, stiff Vata joint and a hot, swollen gouty one can look similar to an untrained eye, yet the chapter treats them as near-opposites — warming the first, cooling the second — because it reads the underlying quality rather than the surface complaint. That habit of looking past the symptom to its nature is the whole art the Sutrasthana is trying to teach.

Cooling the Body: Heat-Relieving Pastes (Daha-prashamana)

One of the most beautiful runs of formulas in the chapter is its set of heat-relieving (daha-prashamana) pastes — applications for the burning sensation (daha, दाह) of aggravated Pitta, of fever, of sunstroke and inflamed skin. These read like a florist's list, and for good reason: cooling, fragrant, watery plants were the classical answer to internal fire.

The first heat-relieving paste gathers saivala, lotus (kamala) and blue lotus (utpala), vetra, punnaga, prapaundarika, usira (vetiver), lodhra, priyangu, kaleyaka and sandalwood, mixed with ghee (Sutrasthana 3.26). The second is built on cooling grasses and creepers — white and blue durva, manjistha, vetasa, padmaka, madhuyasti, aindri, lotus, and the roots of yavasa, kusa and kasa, with hribera and eraka, pounded with ghee (Sutrasthana 3.27). Vetiver, lotus, sandalwood, liquorice and durva grass: even reading the list lowers the temperature.

For the opposite sensation, the chapter provides a warming paste said to relieve a feeling of cold "in no time" — saileya, ela (cardamom), aguru (agarwood), kustha, canda, tagara, twak (cinnamon bark), devadaru and rasna (Sutrasthana 3.28). The same passage records a paste of sirisa with sindhuvara said to counteract poisons (Sutrasthana 3.28). Hot for cold, cool for heat — the chapter keeps returning to the single principle that opposite qualities restore balance.

These cooling pastes also show the chapter at its most sensory. Vetiver (usira), lotus, sandalwood and durva grass are not only cooling in their action; they are fragrant and pleasant, and the classical physician plainly valued that. A medicine that smells of monsoon earth and lotus ponds is one a feverish patient will actually accept and keep using. Comfort, in this chapter, is treated as part of the cure rather than a distraction from it.

Smooth Skin and Body Odour: Ayurveda's First Cosmetics

The Aragvadhiya Adhyaya does not draw the hard line we draw between treating disease and caring for appearance. Its closing formulas slide naturally from the clinical into what we would now call cosmetics and grooming — a reminder that for the classical physician, healthy skin and beautiful skin were the same goal reached by the same means.

So the text gives a paste that relieves both skin disease and excessive perspiration — sirisa, lamajjaka, nagakesara and lodhra, which are to be rubbed together over the skin (Sutrasthana 3.29). In the same breath it moves toward a preparation for foul body odour, an early deodorant built, like the rest, from aromatic and astringent herbs. The chapter that began with weeping, itching skin disease ends with smoothing the skin and sweetening the body — the full arc of skincare, from medicine to maintenance, in a single chapter.

This is the deep root of the Indian ubtan and snana (स्नान, ritual bathing) tradition. The grandmother's recipe of besan, turmeric and a little curd; the wedding ubtan of sandalwood and rose; the fuller's-earth pack for oily skin — all of them are folk survivals of exactly what Chapter 3 describes: powdered herbs and earth, bound with a chosen liquid, worked into the skin to clean, cool and beautify it. We trace that thread in our guide to soap and snana in Ayurveda and in the long history of multani mitti.

There is something quietly modern in this refusal to separate health from beauty. A contemporary dermatologist will tell you that the same barrier which keeps skin free of disease is the one that keeps it looking well, and that gentle, consistent care prevents far more than aggressive correction can repair. The Aragvadhiya Adhyaya reached a similar conclusion by observation alone, and built it into the very order of the chapter: first heal, then maintain, drawing on the same cupboard of herbs throughout.

Living the Aragvadhiya Adhyaya Today

You cannot, and should not, recreate this chapter's clinical pastes at home — the mineral drugs alone put them out of reach. But the chapter's way of thinking about skin is as usable today as it was two thousand years ago, and most of it costs nothing to adopt:

• Treat skin from the outside as well as the inside. The chapter takes external care seriously as real medicine, not vanity. A considered topical routine is Ayurvedic to its core (Su 3.8–9).
• Let the vehicle do half the work. Cooling skin wants a soothing base; rough, dry skin wants oil first. Charaka chose buttermilk, vinegar, oil or ghee by condition — you can choose your cleanser and moisturiser the same way (Su 3.10–11, 3.26–27).
• Oil the skin before you scrub it. The instruction to smear with oil before applying a powder is the ancestor of today's oil-cleansing, and it keeps a scrub from stripping the skin (Su 3.10–11).
• Reach for bitter, cooling herbs for irritated skin. Neem, turmeric and sandalwood earned their place in these formulas honestly; they remain the safest, most useful skin herbs in any Indian home (Su 3.8–9).
• For real skin disease, see a vaidya. The chapter itself is a physician's manual, not a self-help book — honour that.

The gentlest, most everyday survival of the lepa is the herbal bathing ritual — cleansing the whole skin with earth and herbs rather than harsh detergent. That is the spirit our skin products are built in.

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