Fissurectomy: what to know

At a glance

Fissurectomy is a surgical procedure that removes chronic fissure tissue, any sentinel pile (skin tag), and scarred wound edges. The goal is to create a fresh, clean wound that the body can heal properly. Unlike LIS, it does not involve cutting the sphincter muscle.

It is typically considered when a fissure has become chronic — meaning it has not healed after weeks or months of conservative care and topical treatments — and the tissue itself has become scarred and unable to repair on its own.

This page covers what the procedure involves, how it compares to LIS, the combined approach with botox, recovery patterns, wound care, outcomes people describe, and what to discuss with your surgeon.

What the procedure involves

Fissurectomy is focused on removing damaged tissue rather than cutting muscle. The surgeon excises the chronic fissure, including:

• The scarred, fibrotic fissure tissue that has lost its ability to heal
• Any sentinel pile — the small skin tag that commonly forms at the outer edge of a chronic fissure
• Hypertrophied anal papilla — excess tissue that can develop at the inner end of the fissure
• Thickened, fibrotic wound edges that prevent the margins from knitting together

The wound is left open intentionally. This is not a mistake or oversight. Open wounds in this location heal more reliably than closed ones — they granulate from the bottom up, filling in with healthy tissue over several weeks.

Fissurectomy vs LIS

These two procedures are the most commonly discussed surgical options for chronic fissure, and understanding the difference is useful when talking with your surgeon.

What each procedure does

• Fissurectomy removes the damaged tissue — the fissure, sentinel pile, and fibrotic edges — creating a fresh wound
• LIS (lateral internal sphincterotomy) makes a small, controlled cut in the internal sphincter muscle to reduce spasm and improve blood flow

The primary goal

• Fissurectomy addresses the tissue problem: scar tissue that is stuck in a cycle of damage and cannot heal on its own
• LIS addresses the muscle problem: the sphincter spasm that restricts blood flow and prevents healing

Incontinence risk

• Fissurectomy does not involve cutting the sphincter muscle, so the risk of changes to bowel control is generally considered lower
• LIS involves a controlled cut to the sphincter, which carries a small but real risk of changes to gas or bowel control — this should be discussed thoroughly with your surgeon

Recovery profile

• Fissurectomy leaves an open wound that takes several weeks to close. The healing is gradual and visible.
• LIS recovery tends to involve faster wound healing, but the underlying fissure still needs time to resolve

When each is recommended

• Fissurectomy is often favoured when there is significant sentinel pile or fibrotic tissue physically preventing healing, particularly when preserving full sphincter function is a priority
• LIS is often favoured when sphincter spasm is the dominant factor and tissue scarring is less prominent
• Some surgeons perform both together, addressing tissue and muscle in a single procedure

Neither is universally better. The right choice depends on what is driving your specific fissure.

Fissurectomy combined with botox

Many surgeons now offer fissurectomy with a botox injection to the internal sphincter during the same procedure. This combination is increasingly common and people frequently describe good outcomes.

The logic is straightforward:

• Fissurectomy removes the chronic tissue that cannot heal on its own
• Botox temporarily relaxes the sphincter muscle, improving blood flow and reducing spasm during the critical healing window

This combination aims to address both the tissue problem and the muscle spasm problem without permanently altering the sphincter. The botox effect typically lasts 2 to 3 months — enough time for the fresh wound to heal in a lower-tension environment.

People who have had this combined procedure commonly describe:

• Reduced pain compared to what they expected
• The sphincter relaxation making bowel movements more manageable during recovery
• Feeling that the combination gave their wound a genuine chance to heal
• Some temporary changes in gas control while the botox is active, which typically resolves as it wears off

If your surgeon recommends fissurectomy, it is worth asking whether they also use botox as part of the procedure.

Who is typically offered fissurectomy

Fissurectomy is not usually a first-line treatment. It sits further along the treatment path, typically after conservative care and topical treatments have been given adequate time. Your surgeon may discuss fissurectomy if:

• You have a chronic fissure that has not healed with topical treatments (such as GTN or diltiazem) over several weeks or months
• Botox has been tried but the fissure has not healed, or it healed and then recurred
• There is a significant sentinel pile or fibrotic tissue that is physically preventing healing
• The fissure has developed hypertrophied anal papilla — excess tissue at the inner end of the fissure
• You and your surgeon want to avoid cutting the sphincter muscle, making fissurectomy (potentially with botox) a sphincter-sparing alternative to LIS
• You have factors that make sphincter cutting less desirable — such as previous anal surgery, obstetric history, or pre-existing concerns about continence

The decision about which procedure is right is a conversation between you and your surgeon, based on your specific situation, anatomy, and treatment history.

What people describe about procedure day

The procedure is typically done as day surgery. People commonly describe:

• Anaesthesia — general anaesthesia or spinal/regional anaesthesia is most common. Some centres use local anaesthesia with sedation.
• Duration — the procedure itself usually takes 20 to 40 minutes. The time spent in preparation and recovery is longer than the surgery itself.
• The wait — people consistently describe the pre-operative wait as the most difficult part of the day. The surgery itself passes quickly.
• Going home — most people go home the same day, usually a few hours after the procedure. You will need someone to take you home.
• The first hours — the area is numb or heavily numbed. People describe feeling groggy from the anaesthesia but aware that the sharp fissure pain they had been living with already feels different.
• Pain management — your surgeon will provide pain relief to take home. People describe the first two to three days as the most uncomfortable, with the wound settling after that.

Recovery patterns

Recovery from fissurectomy centres on an open wound healing gradually from the inside out. People commonly report this general pattern:

Days 1 to 3 — wound pain is expected. People describe it as a raw, surface-level soreness rather than the sharp, tearing pain of a fissure. Sitting can be uncomfortable. Many people find the first couple of days the hardest. If botox was given alongside, the sphincter relaxation begins building gradually during this time.

Days 4 to 14 — gradual improvement. The wound begins to settle. People describe developing a routine around wound care, sitz baths, and managing bowel movements. Pain decreases noticeably for most people during this period. Many describe a turning point around day 5 to 7 where things start to feel more manageable.

Weeks 2 to 4 — significant improvement for most people. Many return to daily activities, including work, during this window. The wound is visibly healing. Pain with bowel movements continues to decrease. Some people describe occasional setbacks — a harder bowel movement can temporarily irritate the wound.

Weeks 4 to 8 — the wound continues to close. Most people report feeling substantially better by this stage. Occasional sensitivity or awareness of the wound site is normal. Full closure varies — some people heal faster, others take the full 8 weeks or slightly longer.

Recovery timelines vary between individuals. Try not to compare your progress to others.

What helps during recovery

People who have been through fissurectomy consistently mention certain things that made a meaningful difference:

• Sitz baths — warm water for 10 to 15 minutes, particularly after bowel movements. People describe this as the single most helpful thing during recovery. It soothes the wound, keeps the area clean, and becomes a comforting routine.
• Keeping stools soft — this comes up in nearly every account. Discuss with your surgeon what approach is right for you. People describe this as not optional during recovery — a hard bowel movement can irritate the healing wound and set things back.
• Fibre and hydration — consistently described as essential. Good fibre intake and plenty of water support regular, soft bowel movements throughout the healing window.
• Gentle cleaning — people often mention using a bidet, peri bottle, or shower head rather than dry wiping. Being gentle with the wound area matters during recovery.
• Pain relief as directed — taking prescribed pain relief as directed rather than waiting until pain becomes severe. Staying ahead of the pain in the early days is easier than catching up.
• Rest in the first week — giving yourself permission to do very little. People describe trying to push through too quickly as a common regret.
• Loose, breathable clothing — avoiding anything tight or irritating around the wound site.
• Avoiding prolonged sitting — particularly in the first week. Short walks can help with circulation and bowel regularity.
• A recovery journal — tracking symptoms, bowel movements, and wound progress gives you something concrete to share with your surgeon at follow-up.

Outcomes people describe

Success with fissurectomy depends on the specific approach, whether it is combined with botox or a sphincterotomy, and individual factors.

What people commonly report:

• Many people describe the procedure as effective in resolving their chronic fissure, particularly when combined with botox
• The absence of the sharp fissure pain — sometimes felt within the first week — is frequently described as significant, even while the surgical wound is still healing
• People who had been in a long cycle of failed conservative treatments often describe fissurectomy as the turning point in their recovery

Recurrence:

• Some people experience recurrence of their fissure after fissurectomy. Recurrence rates vary and depend on factors including the technique used and whether the underlying spasm was also addressed.
• Recurrence is more commonly reported when fissurectomy is done alone, without botox or sphincterotomy to address the sphincter spasm
• If a fissure does recur, there are further options. This is not a dead end.

Long-term:

• People describe long-term outcomes positively in many cases, particularly when good habits around fibre, hydration, and bowel care are maintained
• Continence outcomes are generally favourable since the sphincter muscle is not cut during fissurectomy alone
• Some people describe the sentinel pile area remaining slightly different in appearance long-term, which is expected

Your surgeon can discuss the outcomes they see in their practice and what is realistic for your specific situation.

Questions to ask your surgeon

People who have been through fissurectomy commonly say they wish they had asked more beforehand. Some questions others have found helpful:

• Will you be doing fissurectomy alone, or combined with botox or LIS?
• What does the wound look like after the procedure, and how will I know if it is healing normally?
• How long should I plan to be off work or away from my usual activities?
• What should I use for stool softening during recovery, and when should I start?
• What does normal bleeding look like versus something I should call about?
• How will follow-up work — will you check the wound, and when?
• What is your experience with this procedure, and what outcomes do your patients typically have?
• If this does not work, what would the next step be?

Write your questions down and bring them to your appointment. It is easy to forget in the moment.