Good, I have solid textbook content. Here's a thorough answer:
Your Anal Fissure: What's Likely Happening
A fissure diagnosed 3 years ago that is still causing occasional bleeding is almost certainly a chronic anal fissure. By definition, any fissure lasting more than 8 weeks is classified as chronic. The fact that you get bleeding every few months suggests the fissure is either:
- Not fully healed and keeps re-opening when you pass a hard or large stool
- Healing and re-tearing in a cycle - very common with chronic fissures
This is a known, recognized pattern. You are not imagining things, and it is not "just normal." But here is the key point - it is also very treatable.
Why Chronic Fissures Keep Coming Back
The core problem is a cycle:
- Pain and injury cause the internal anal sphincter to go into spasm
- Spasm reduces blood flow to the area, preventing healing
- Reduced blood flow means the tissue stays fragile and re-tears with the next difficult bowel movement
Breaking this spasm cycle is the entire goal of treatment. - Fischer's Mastery of Surgery, 8th Ed.
Treatment Options (Step by Step)
Step 1 - Lifestyle and Diet (Foundation)
These are essential regardless of what else you do:
- Fiber intake: Aim for 25-35 grams/day (fruits, vegetables, whole grains, or a supplement like psyllium/Metamucil)
- Water: Drink at least 8 glasses a day to keep stools soft
- Sitz baths: Sit in warm water for 10-20 minutes after each bowel movement - relaxes the sphincter and improves blood flow
- Avoid straining during bowel movements
- Stool softeners (e.g., Miralax/polyethylene glycol) if stools are hard
Step 2 - First-Line Medical Therapy
If lifestyle changes alone are not enough (which they often aren't for chronic fissures):
| Treatment | How It Works | Effectiveness |
|---|
| Topical GTN (nitroglycerin) cream | Releases nitric oxide, relaxes sphincter, improves blood flow | ~50-60% healing at 3 months; headache is main side effect in ~20-30% |
| Topical diltiazem cream (calcium channel blocker) | Relaxes sphincter muscle | 40-60% healing at 3 months; fewer side effects than GTN |
| Topical nifedipine | Similar to diltiazem | Comparable results |
Applied directly over the fissure after bowel movements, 2-4 times daily. - Fischer's Mastery of Surgery, 8th Ed.
Important: The cumulative relapse rate after conservative medical treatment alone is around 50% at 12 months, which is likely why your fissure keeps returning.
Step 3 - Second-Line: Botulinum Toxin (Botox) Injection
When topical treatments fail:
- Botox is injected into the sphincter muscle
- Achieves healing in 40-60% of cases
- Effect lasts ~3 months, giving the fissure time to heal
- Risk of temporary incontinence (this is usually transient)
Step 4 - Surgery: Lateral Internal Sphincterotomy (LIS)
For fissures that fail all other treatments:
- A small portion of the internal anal sphincter is cut, permanently reducing spasm
- 90% success rate - the most effective treatment available
- The Mayo Clinic notes surgery is "much more effective than any medical treatment for chronic fissure"
- Risk: 20-40% may have temporary gas/soiling incontinence; long-term incontinence is less common but possible (~3%)
What You Should Do Now
Since you were diagnosed 3 years ago and still have recurring bleeding, you have a chronic, recurrent fissure that has not been fully treated. Here is what to do:
- See a colorectal surgeon or gastroenterologist - not just a general doctor. You need a proper examination to confirm it is still the fissure causing the bleeding (and rule out anything else, like a polyp).
- Ask about topical diltiazem or GTN cream if you haven't tried them properly.
- Discuss Botox injection or LIS surgery if topical treatments have failed previously.
3 years is a long time to live with this. Modern treatment can very likely end the cycle for you.