If you have been told your fistula (Bhagandar) needs an operation — or worse, if you already had that operation and the boil has come back — this article was written for you.
Every week at our Prayagraj clinic I meet patients who have lived with a leaking, recurring fistula for years, having tried antibiotics, ointments, even two surgeries. Most are astonished to learn that India has, for over two thousand years, possessed a fistula treatment that modern research has repeatedly found more dependable than the scalpel: Ksharsutra (क्षारसूत्र), the medicated thread.
As an MD in Shalya Tantra — the Ayurvedic surgical tradition — this is the technique I have built my practice around since 2008. Here is what it is, how it works, and why it earned its “gold standard” reputation.
What Exactly Is Ksharsutra?
The word is the explanation: kshar means medicinal alkali, sutra means thread. First described by the ancient surgeon Sushruta, Ksharsutra is a parasurgical technique — it achieves what surgery achieves, without scalpel, stitches or operating theatre.
A surgical linen thread, coated layer upon layer with herbal medicines, is passed through the fistula track and gently tied. From that moment it performs three jobs at once: it cuts through the infected track gradually, drains pus continuously so nothing collects inside, and sterilises and heals the tissue as it advances — cutting and healing simultaneously, a property no knife or laser can copy.
What Is the Medicated Thread Made Of?
The classical preparation, standardised through university research, involves twenty-one careful coatings:
- Snuhi latex (milk of Euphorbia neriifolia) — eleven coats that bind the layers and provide a mild, controlled cutting action.
- Apamarga kshar (purified alkali of the Achyranthes aspera plant) — seven coats. This alkali is the workhorse: it chemically debrides the infected track wall and destroys the pus-forming lining.
- Haridra (turmeric) powder — three final coats, adding anti-inflammatory and antimicrobial action that calms the tissue just treated.
The thread must be freshly and correctly prepared — its potency is the treatment, which is why Ksharsutra should be taken only from a trained Shalya Tantra specialist.
How the Treatment Works, Week by Week
At the first sitting, the track is probed and mapped, and the thread is passed through its full length under local anaesthesia — from the outer opening on the skin to the internal opening inside the anal canal — and tied loosely. That is the entire “procedure”.
Then, once every week, the old thread is exchanged for a fresh one in a simple ten-to-fifteen-minute sitting, renewing the medicine. Week by week the thread cuts through roughly half to one centimetre of track — while the portion behind it heals completely before the thread moves ahead. The track is cut from the inside out and healed from the bottom up, leaving no cavity where pus can ever collect again.
Walk In, Walk Out: A True Day-Care Treatment
There is no hospital admission, no general anaesthesia, no bed rest and no open wound to dress at home. Patients come for their weekly sitting and return to office, shop or kitchen the same day. Compare that with conventional surgery: admission, anaesthesia fitness tests, weeks of painful dressings and lost earnings. For working people, that difference often decides whether treatment happens at all.
Why Fistula Recurs After Surgery — and Why It Doesn’t With Our Protocol
A fistulectomy removes the track the surgeon can see. But fistulas are deceptive — they hide side branches, curved extensions and a deep internal opening. If even a few millimetres of infected lining is missed, the tunnel re-forms, which is why so many operated patients find the boil returning within months. Deep cutting near the anal muscle also carries a real risk to stool control.
Ksharsutra avoids both problems by design. The thread sits inside the entire track including the internal opening, sterilising every millimetre as it cuts, while the slow pace lets the sphincter heal behind it — so continence is preserved. At Shree Vishwshraddha Chikitshalaya we follow a strict Zero Recurrence Ksharsutra Protocol: complete track mapping, freshly prepared thread at every sitting, weekly changes continued until the track has fully healed — never stopped early — and supervised diet throughout. Across 1,000+ anorectal cases since 2008, this is our documented track record; many of our fistula (Bhagandar) patients came to us after surgery elsewhere had failed.
The Research Heritage: BHU, ICMR and WHO
Ksharsutra is not folk medicine — it is one of the best-researched Ayurvedic procedures in existence. It was revived and standardised in the 1960s and 70s at the Department of Shalya Tantra, Banaras Hindu University, under Prof. P. J. Deshpande. The Indian Council of Medical Research (ICMR) later ran a multicentric clinical trial — including at AIIMS, New Delhi — comparing Ksharsutra with conventional fistulectomy, and reported fewer recurrences with the thread. On the strength of this work, the World Health Organization has recognised Ksharsutra as the treatment of choice for fistula-in-ano. This is the lineage in which MD (Shalya Tantra) surgeons are formally trained.
Healing Timelines, Cost and Insurance
Duration depends on the track’s length and complexity: a simple fistula typically heals in four to eight weekly sittings; longer or branched tracks can take three months or more. The same thread technique, adapted, also treats piles (Bavaseer) and pilonidal sinus at our clinic.
Because there is no operation-theatre charge, no anaesthetist and no hospital stay, the total cost is a fraction of private surgical treatment. We also accept Mediclaim / health insurance — bring your policy documents to the first consultation and our staff will guide you through the paperwork.
When to See a Doctor
See a specialist promptly — not “after Diwali”, not “when it bursts again” — if you have:
- A boil near the anus that keeps refilling at the same spot, even if painless between episodes.
- Pus or blood-stained discharge staining your undergarments.
- Throbbing anal pain with fever — a likely abscess, far easier to treat before it tunnels into a fistula.
- A fistula that has returned after previous surgery.
- Any anal discharge alongside diabetes, since healing is slower and infection spreads faster.
If you are unsure what your symptoms mean, our free symptom checker can point you in the right direction in two minutes. Or simply message us on WhatsApp at +91 94518 46947 — we consult at Jhushi (10 AM–2 PM, daily) and Allahpur (5 PM–9 PM, Mon–Sat), and a lady doctor is available for female patients.
Frequently Asked Questions
Is Ksharsutra treatment painful?
The initial thread placement is done under local anaesthesia, so you feel pressure but not pain. After weekly changes, most patients report a day or two of mild soreness or pulling, easily managed with sitz baths and prescribed medicines. Patients who have experienced both almost always call Ksharsutra far more comfortable than the open wound and dressings of conventional surgery.
How many days does Ksharsutra take to cure a fistula (Bhagandar)?
The thread cuts and heals roughly one centimetre of track per week, so a short simple fistula usually completes in four to eight weekly sittings, while long or branched tracks may need three months or more. An exact estimate is given after the track is mapped at your first visit — and you remain able to work and travel throughout.
Is fistula treatment without surgery really permanent?
Ksharsutra is not a medicine that merely dries the discharge — it physically eliminates the infected track and its internal opening, with the whole track treated under direct control every week. In our clinic’s experience across 1,000+ anorectal cases since 2008, patients who completed the full Zero Recurrence Protocol have not had the same track return. Individual healing does vary, which is why we insist on completing every sitting rather than stopping when the discharge first disappears.