HomeTreatmentsAnal FissureGrades

Stages & Classification
of Anal Fissure

Doctors classify fissures based on Time (Acute vs. Chronic) and Depth. Knowing your grade helps decide between Medicine or Surgery.

Medically Reviewed by Dr. Jaya Maheshwari
Last Updated: Jan 2026

The 2 Main Categories

Acute Fissure

A tear that is less than 6 weeks old. It looks like a fresh paper cut. The muscle is not exposed.

90% Heal with Medicine

Chronic Fissure

Persists for more than 6-8 weeks. The edges become thick and white (scar tissue). A skin tag often forms.

Surgery Recommended

Detailed Grading System

Grade 1

| Acute Fissure (Superficial)

A fresh, paper-cut like tear. Edges are clean and soft. There is severe pain but bleeding is minimal.

Treatment: Heals with Diet & Ointments (90% cure).

Grade 2

| Chronic Fissure (Deep)

The tear exposes the internal sphincter muscle fibers. Edges become hard (fibrosed). Pain lasts for hours.

Treatment: Needs Botox or specialized creams.

Grade 3

| Chronic with Sentinel Tag

A hallmark of chronicity. A skin tag (Sentinel Pile) forms at the lower end of the tear. Often mistaken for hemorrhoids.

Treatment: Usually requires Laser Surgery (LIS).

Grade 4

| Complicated Fissure

Associated with infection, abscess, or fistula formation. The tissue is infected and very painful.

Treatment: Complex Surgery needed.
Director's Interview

Is My Fissure Chronic?

Identifying the 'Sentinel Tag'

"Once a 'Sentinel Tag' appears, it's a sign the body has tried and failed to heal the wound naturally. This usually indicates Grade 3."

Dr. Jaya Maheshwari explains visually how to tell if your fissure has become chronic and why old fissures stop responding to ointments.

Vice President IAGES (2020–2022)
Trained in Germany & USA
Pioneer of Laser Proctology
Now Watching: Dr. Jaya on Advanced Treatments

Why Grade Matters?

Applying creams on a Grade 3 (Chronic) fissure is often a waste of time because scar tissue prevents healing. Grading ensures you don't delay the right treatment.

Get Assessed

Not sure if it's Acute or Chronic? A simple checkup will confirm.

Book Appointment