Lateral Internal Sphincterotomy (LIS)
The surgical gold standard for chronic anal fissure — a small incision into the internal sphincter relieves spasm and allows the fissure to heal permanently.
Watch & Learn
What is Anal Fissure? — Causes, Symptoms & Treatment
About This Treatment
Lateral Internal Sphincterotomy (LIS) is considered the gold standard surgical treatment for chronic anal fissure. A small surgical incision is made in the internal anal sphincter at the lateral (side) position — away from the fissure itself — to relieve the pathological sphincter spasm that prevents natural healing.
By cutting a controlled portion of the internal sphincter, blood supply to the fissure is restored and the painful spasm resolved. The fissure then heals on its own over the following 4–8 weeks. LIS has a cure rate of 95%+ for chronic fissures.
At Shraddha Hospital, we perform LIS as a closed (blind) or open technique under local or spinal anesthesia, depending on the complexity.
Key Benefits
95%+ Cure Rate
LIS is the most effective surgical treatment for chronic anal fissure — the gold standard worldwide.
Quick Procedure
Takes 15–20 minutes under local anesthesia. Day-care procedure with same-day discharge.
Rapid Pain Relief
Sphincter spasm — the primary source of fissure pain — resolves within days.
Why Choose This Treatment?
| Feature | This Treatment | Traditional |
|---|---|---|
| Cure Rate | check95% (LIS) | 60% (Medical management) |
| Procedure Time | check15–20 minutes | N/A (Ongoing medical) |
| Pain Resolution | checkDays | Weeks to months |
| Recurrence | check<5% | 40–50% (Medical) |
Before Treatment
- 01
Clinical confirmation of chronic fissure with failed medical management.
- 02
Anal manometry to measure baseline sphincter pressure.
- 03
Basic blood tests. Local anesthesia — no fasting required for most cases.
After Treatment
- 01
Same-day discharge in most cases.
- 02
Sitz baths 3 times daily for 2–3 weeks.
- 03
High-fiber diet and stool softeners for 6 weeks.
- 04
Mild painkillers for the first 2–3 days.
- 05
Follow-up at 2 weeks and 6 weeks to confirm fissure healing.
Frequently Asked Questions
Cure Your Chronic Fissure Once and For All
LIS offers a 95%+ cure rate for chronic anal fissures. Stop living with the pain — book a consultation today.