More guides and experiences about Anal fissure. Explore all →

How long does fissure botox last

Published 13 March 2026 ·Last reviewed 13 March 2026 by the editorial team ·How we create our content

At a glance

Botox for anal fissure is a temporary treatment by design. It relaxes the sphincter for a limited period — typically two to three months — to create the conditions for the fissure to heal. Understanding this timeline helps you make the most of the treatment window.

The timeline

Week one: taking effect

The botox begins working within days of injection but typically takes one to two weeks to reach full effect. During this period, the sphincter gradually relaxes and blood flow to the fissure site improves.

Weeks two to eight: peak effect

This is the main treatment window. The sphincter is at its most relaxed, blood flow is improved, and the conditions for healing are optimal. This is when maintaining soft stools and good self-care matters most — the botox is doing its part, and your job is to support it.

Months two to three: gradual wearing off

The effect of botox does not end suddenly. It fades gradually as the muscle nerve connections regenerate. People describe a subtle return of sphincter tone — the muscle gradually firms up again.

After month three: the assessment

By three months, the botox effect has largely worn off. The key question: has the fissure healed?

  • If yes — the treatment has achieved its goal. The sphincter returns to normal tone, and the healed tissue remains intact.
  • If partially — the fissure has improved but is not fully healed. A second injection or alternative treatment may be discussed.
  • If no — the fissure has not responded. The conversation shifts to other options.

Making the most of the window

The botox window is finite. People who describe the best outcomes are those who maximised the healing conditions during this period:

  • Consistent stool management — every day, no lapses
  • Sitz baths — continuing the routine even when symptoms improve
  • Prescribed topical treatment — some clinicians recommend continuing this alongside botox
  • Not relaxing too early — the temptation to ease off when feeling better can waste the window

What happens as it wears off

The gradual return

People describe the wearing off as subtle:

  • A slight increase in sphincter tightness
  • Bowel movements that feel slightly different — not necessarily painful, but a change
  • A period of vigilance — monitoring for signs that the fissure is still healed

If the fissure has healed

The return of normal sphincter tone does not re-create the fissure. If the tissue has healed completely, it can withstand normal muscle function. Some people describe mild anxiety as the botox wears off, but no return of fissure symptoms.

If the fissure has not fully healed

Pain may gradually return as the sphincter tightens. This is the signal to contact your surgeon and discuss next steps.

Second injections

Some people need more than one round of botox:

  • A second injection extends the treatment window
  • Some fissures that showed partial improvement with the first injection heal fully with a second
  • The decision to repeat is based on how the fissure responded and your surgeon’s assessment
  • If botox has been ineffective after two rounds, most surgeons recommend considering surgery

The bigger picture

Botox is a means to an end, not the end itself. It buys time for the fissure to heal by addressing the sphincter spasm that was preventing healing. The healing itself depends on maintaining the right conditions — soft stools, good blood flow, no re-injury — throughout the window. When the botox wears off, what matters is what happened to the tissue during the treatment period.

Common questions

How long does botox last for an anal fissure?

The effect of botox typically lasts two to three months. The peak effect is usually reached within one to two weeks of injection, and the muscle-relaxing effect gradually wears off over the following weeks. The exact duration varies between individuals.

Will the fissure come back when the botox wears off?

Not necessarily. The purpose of botox is to create a window of reduced sphincter tension during which the fissure can heal. If the fissure heals completely during this window, it does not need to still be under the effect of botox. Many people heal during the botox period and do not experience recurrence.

What if my fissure has not healed by the time botox wears off?

If the fissure has not fully healed, your surgeon may recommend a second botox injection, a different treatment approach, or surgery. This is a normal part of the decision-making process, not a failure.

Can I have botox injected more than once?

Yes. Some people have two or even three rounds of botox. Each injection provides another window for healing. However, if botox has not been effective after two rounds, many surgeons will recommend discussing surgical options.

When to seek care Heavy bleeding or feeling faint? Get emergency help now. Emergency: 911

Not sure how urgent it is? Get help today.

  1. Emergency

    Heavy bleeding, black tarry stools, feeling faint, severe pain or trouble breathing.

    Call 911 or go to the ER.

  2. Today

    Fever, pain getting worse, a hot swollen lump, or trouble passing urine.

    Call your doctor or go to urgent care.

  3. Soon

    Bleeding or bowel changes nobody has checked, or anything lasting 3 weeks.

    Book a doctor’s appointment.

Feeling overwhelmed? Call or text 988, any time.

See all the signs

For this topic, get medical advice if you notice:

  • Heavy or persistent bleeding that does not settle
  • Severe pain that is getting worse rather than better
  • Difficulty controlling gas or bowel movements
  • Symptoms returning as botox wears off

Recording how you feel is not the same as being checked. These are the signs that need a doctor’s attention.

Call 911 or go to the emergency room now if you have:

  • bleeding that will not stop, a lot of blood (the toilet water turns red, or you pass large clots), or any bleeding with feeling faint or dizzy
  • fainting, a racing heart or trouble breathing
  • confusion or slurred speech, extreme shivering, no urine in a day, or blotchy skin
  • sudden severe belly pain, or a swollen, hard belly with vomiting or not passing stool or gas
  • you cannot pass urine at all, or your bladder feels full and painful and you can’t empty it
  • redness, swelling or severe pain spreading quickly around your anus, genitals or groin, especially with a fever or feeling very ill
  • a fever with a painful swelling near your anus if you have diabetes or a weakened immune system (for example, from chemotherapy or transplant medicines)
  • black, tarry stools

Call your doctor or go to urgent care today (or the ER if you can’t be seen today) if you have:

  • a temperature of 100.4°F (38°C) or higher, chills, vomiting, or feeling generally unwell
  • pain that is getting worse over days, or severe pain that stops you sitting or sleeping
  • a hot, swollen or very tender lump near your anus or at the top of the crease between your buttocks, or foul-smelling discharge
  • trouble urinating
  • bleeding that is getting heavier or more frequent, or blood mixed into your stool
  • feeling much more tired than usual, looking pale, or getting out of breath more easily than you used to
  • not passing stool for several days, or new belly pain

Make an appointment with your doctor if:

  • you have never had these symptoms checked by a doctor or nurse — whatever your age
  • you have had rectal bleeding for more than 3 weeks
  • your bowel movements have been looser, thinner or more frequent than usual for 3 weeks or more, or you have lost weight without trying
  • symptoms have not settled after a week or so, or keep coming back
  • you notice a new lump near your anus, between your buttocks or in your belly, or an itch or discharge that does not clear
  • you have new leakage or trouble controlling your bowels
  • you are 45 or over, or have a family history of bowel cancer or inflammatory bowel disease, and any of these symptoms are new for you

If you are unsure, it is always reasonable to ask. If things feel overwhelming, call or text 988 (Suicide & Crisis Lifeline) or chat at 988lifeline.org, any time. If you don’t feel safe, call 911.

Showing US care routes. Change region at the foot of the page.

Related symptoms

BleedingPain during bowel movementsPain after bowel movementsSpasm or crampingConstipation

Discreet symptom tracking

Symptoms that come and go? Keep track, day by day.

For hemorrhoids, fissures, fistulas and other anal and rectal problems. A short, discreet email asks how things have been, and saves each answer, so you can look back at every flare and every good week in your own words. If you haven’t had your symptoms checked, see your doctor first.

  • About ten seconds a check-in. No app, no password.
  • Nothing in the subject or preview says what it’s about.
  • Each Sunday, a link to your week, ready for your next appointment.
Start tracking →

Your notes

Your check-in

Takes about ten seconds.

20:00
Example. Nothing on the lock screen hints at symptoms or conditions.

Explore more

Related guides

Botox for fissure: what people report

What botox treatment for chronic anal fissure involves, what people report about the procedure and recovery, effectiveness patterns.

Botox injections for fissure: the day

A practical guide to the day of botox injections for anal fissure — what the injections feel like, how long it takes, anaesthesia options.

Thinking about fissure surgery

A framework for weighing surgical options for a chronic fissure — the questions to ask, the factors to consider.

Related experiences

Botox for fissure: the first few weeks

A detailed look at what the first few weeks after botox for an anal fissure are really like — the day-by-day reality, the waiting.

Fissure botox recovery timeline

What the first days and weeks after botox for a fissure look like, based on patterns from many recovery accounts.

When fissure botox does not work

What people experience when botox for a fissure fails — repeat injections, next steps, and how people move forward after botox does not heal their fissure.

All content about Anal fissure →