Fistula in Ano: Causes, Symptoms, and Ayurvedic Treatment

Fistula in ano is a chronic condition in which an abnormal tunnel-like tract forms between the inside of the anal canal and the skin surface near the anus. It is a persistent and often recurrent condition that rarely resolves on its own. Ayurveda, which describes this condition as “Bhagandara,” has dealt with it for centuries, and offers Kshar Sutra therapy as a time-tested, highly effective treatment — applicable to both simple and complex fistulas — that addresses the root cause rather than just the symptoms.

What is Fistula in Ano?

A fistula in ano develops when an anal gland infection leads to an abscess, which, if not adequately treated, tracks and forms a tunnel connecting the anal canal to the skin outside. It is broadly classified based on complexity:

Simple (low) fistula – involves a single tract that passes below or through a small portion of the sphincter muscle
Complex (high) fistula – involves multiple tracts, branching passages, or a tract that passes through a significant portion of the sphincter muscle, and may be associated with underlying conditions like Crohn’s disease or tuberculosis

Causes of Fistula in Ano

A fistula almost always originates from an infection or inflammation in the anal glands. Common contributing factors include:

Anorectal abscess that has not healed completely or has been inadequately drained
Chronic constipation and repeated straining
Tuberculosis, particularly in regions where it is endemic
Inflammatory bowel diseases such as Crohn’s disease
Prior anal surgery or trauma
Diabetes, which impairs healing and increases infection risk
Persistent diarrhea, which irritates the anal glands
Weakened immunity, making the body more prone to recurrent infections

Common Symptoms

Fistula in ano presents with a set of persistent and often recurring symptoms:

Continuous or intermittent discharge of pus or blood-stained fluid from an opening near the anus
Pain and swelling around the anus, often worsening before pus discharge and easing afterward
Itching and skin irritation due to constant discharge
Fever and malaise during periods of active infection or abscess formation
A visible external opening on the skin near the anus
Recurrent abscess formation in the same area
Foul-smelling discharge in long-standing cases

Ayurvedic Approach: Kshar Sutra Therapy for All Fistulas

Unlike many other anorectal conditions where treatment differs by severity, Ayurveda recommends Kshar Sutra therapy as the definitive treatment for fistula in ano across both simple and complex types. This makes it one of the most versatile and widely validated para-surgical procedures in Ayurvedic surgery, with decades of clinical research and documentation, including studies conducted by India’s Central Council for Research in Ayurvedic Sciences (CCRAS).

Kshar Sutra is a specially prepared medicated thread, coated repeatedly with herbal substances such as Snuhi (Euphorbia neriifolia) latex, Apamarga Kshar, and turmeric, which impart cutting, cleansing, and healing properties.

How Kshar Sutra therapy works:

The thread is passed through the entire fistulous tract, from the internal opening to the external opening
It is tied snugly and left in place, exerting a slow, continuous cutting and cauterizing action
As the thread gradually cuts through the tract, it simultaneously promotes healing of the tissue behind it, laying down healthy fibrous tissue
The thread is replaced with a fresh one at regular intervals, typically every 5–10 days, until the entire tract is laid open and healed

Why Kshar Sutra works for both simple and complex fistulas:

In simple fistulas, it cuts through the limited tract efficiently with minimal disruption to the surrounding muscle
In complex fistulas with multiple or branching tracts, it can be applied to each tract systematically, something conventional single-stage surgery often struggles to manage without significant sphincter damage
The slow cutting action allows the sphincter muscle to heal and fibrose as it is gradually divided, significantly reducing the risk of incontinence, a major concern with conventional fistulotomy in high or complex fistulas
Its antimicrobial and anti-inflammatory action reduces the chances of residual infection and recurrence
It avoids the need for a major single-stage surgery, making it suitable even for patients with multiple recurrences or previous failed surgeries

Why Medicines Alone Cannot Cure a Fistula

It is important to understand that medicines only provide temporary symptomatic relief in fistula in ano — they cannot achieve a permanent cure. Ayurvedic and conventional medicines both have a limited but important supportive role:

Anti-inflammatory and antimicrobial herbs can reduce pus discharge and control secondary infection
Analgesic formulations help manage pain and discomfort during flare-ups
Herbal decoctions and sitz baths offer temporary relief from swelling and irritation
Immunity-supporting formulations may help reduce the frequency of abscess recurrence

However, since a fistula is essentially a persistent tract lined with unhealthy tissue, no medicine can close or heal this tract on its own. Once formed, the tract tends to remain open or intermittently discharge, with symptoms subsiding temporarily only to recur once medication is stopped. Kshar Sutra therapy remains the only reliable way to achieve complete closure of the tract and a lasting, permanent cure, which is why it is considered the gold-standard Ayurvedic treatment for this condition.

Conclusion

Fistula in ano is a persistent condition that cannot be resolved through medication alone, regardless of how effective the drugs are at controlling symptoms. Kshar Sutra therapy, applicable to both simple and complex fistulas, offers a scientifically validated, minimally invasive, and sphincter-preserving path to permanent cure. While medicines have their place in managing acute discomfort and infection, patients seeking lasting relief should consider Kshar Sutra therapy as the definitive treatment option.

This article is for informational purposes only. Anyone experiencing symptoms of fistula in ano should consult a qualified Ayurvedic physician or general surgeon for proper diagnosis and personalized treatment.