What this experience covers
This experience traces the week-by-week recovery from lateral internal sphincterotomy (LIS) for a chronic anal fissure. It is a composite from many anonymized accounts — not one person’s story, but the common patterns across many recoveries.
If you are looking for the decision-making journey — how people weigh the choice to have LIS — see the related experience on LIS surgery decision and recovery. This page focuses specifically on what the recovery looks like, week by week, once the surgery is done.
Recovery from LIS is generally shorter and less physically demanding than many people expect. But it is also more emotionally complex than people anticipate. Each week brings its own challenges and milestones, and knowing what to expect helps reduce the anxiety that accompanies every new sensation.
The pattern
Day of surgery and first night
The procedure itself is short — typically 15 to 30 minutes. Most people go home the same day. The immediate post-surgery experience involves grogginess from anaesthesia, mild soreness at the surgical site, and a distinct awareness that something is different. Many people notice immediately that the characteristic fissure pain — the sharp, burning sensation — is already changed.
The first night involves rest, managing the initial soreness, and waiting. The anticipation of the first bowel movement begins almost immediately.
Week 1: getting through the firsts
The first bowel movement is the single most anticipated event in LIS recovery. It typically happens within one to three days of surgery. People approach it with significant anxiety, but the consistent report is that it is less painful than a bowel movement with an active fissure. Uncomfortable, yes. Stinging or raw, often. But the deep, spasming, tearing pain is usually gone or dramatically reduced.
After the first bowel movement, the psychological relief is significant. The unknown has been replaced by the known, and the known is manageable.
The rest of week one involves:
- Mild to moderate soreness that decreases daily
- Pain medication for the first two to four days, often transitioning to over-the-counter relief
- Sitz baths after every bowel movement — these are consistently described as soothing and helpful
- Some minor bleeding or spotting, which is normal
- Limited activity — rest, gentle walking, avoiding heavy lifting or straining
Week 2: the shift
Week two is when many people describe a turning point. The surgical soreness fades. Bowel movements become less of an event and more of a routine. The fear that accompanied every trip to the bathroom begins to ease.
The most commonly described realisation during week two is the absence of the chronic fissure pain. For people who have lived with it for months or years, the silence — the lack of constant background pain — is striking and sometimes disorienting.
Some people notice minor changes in gas control during this period. Less warning before needing to pass gas, or a slight sense of urgency. For most, this is mild and does not significantly affect daily life.
Weeks 3 to 4: returning to normal
Activity levels increase. Many people return to work during this period, if they have not already. Exercise can typically be resumed gradually — walking first, then building back to previous routines.
Bowel movements are becoming routine. The elaborate preparation and recovery rituals that accompanied each one during fissure life are no longer needed. People describe this as a quiet freedom.
The follow-up appointment with the surgeon usually happens during this period. Hearing that the fissure has healed or is healing well is an emotional milestone.
Months 2 to 3: settling in
Any minor continence changes that appeared in the early weeks typically resolve during this period. The sphincter adjusts to its new resting tone. People describe a return to normal bowel habits.
The emotional recovery continues. People describe gradually letting go of the vigilance and anxiety that the fissure demanded. They stop planning their day around bathroom access. They eat without calculating consequences. The reclaiming of normal life is described as one of the most meaningful aspects of recovery.
What people try
- Stool softeners started before surgery and continued for at least four weeks after
- High-fibre diet with plenty of water throughout the recovery period
- Sitz baths after every bowel movement for the first two to three weeks
- Gentle walking from day one to promote circulation
- Loose, comfortable clothing during the first two weeks
- Taking adequate time off work — people who took two weeks describe easier recoveries than those who returned after a few days
When this experience prompts people to contact their doctor
- Bleeding that is heavy or not stopping
- Pain that is increasing after the first few days rather than decreasing
- Fever or signs of infection
- Continence changes that are not improving by weeks four to six
- Any symptom that does not feel right — people consistently describe their surgical team as welcoming questions
If you experience heavy bleeding, fever, or significant changes in bowel control, seek medical care promptly.