At a glance
Anal self-dilatation is a treatment approach that some clinicians recommend for chronic anal fissures, particularly those associated with high resting sphincter pressure. The idea is that by gently and progressively stretching the internal sphincter, the resting pressure can be reduced, blood flow to the fissure can improve, and healing can occur.
It is not a mainstream first-line treatment, and opinions among clinicians vary. This guide covers what the approach involves and what people describe about their experience with it.
How it works
The internal sphincter in people with chronic fissures is often tighter than normal. This high resting pressure is a key factor in preventing healing. Self-dilatation aims to reduce this pressure gradually through regular, gentle stretching.
What a clinician-led programme usually includes:
- A set of graduated anal dilators supplied or specified by the clinic
- Lubricant
- A routine, with the frequency, session length and progression set by the clinician
- Direction and monitoring from a clinician
We deliberately do not describe sizes, timings or technique here. Those belong in the instructions you are given in person.
What people describe
The initial experience
Starting self-dilatation is daunting. The idea of inserting something into an area that is already painful requires significant mental effort. People describe:
- Anxiety before the first session that is often worse than the experience itself
- Discomfort that is real but manageable with adequate lubrication and a slow approach
- Awkwardness — the practical logistics of the process in a private space
- Gradual familiarity — it becomes less daunting with repetition
Over time
People who persist with self-dilatation describe:
- The routine becoming less uncomfortable as the sphincter gradually loosens
- Some noticing a reduction in post-bowel-movement spasm
- Others noticing little change and eventually discussing alternatives with their clinician
- The discipline required to maintain a daily routine being a significant factor
Results
The experiences people describe are mixed:
- Helpful for some — reduced sphincter tension, less pain during bowel movements, and eventual healing of the fissure when combined with other measures
- Insufficient for others — the dilatation did not reduce pressure enough, or the fissure was too chronic to respond to this approach alone
- Uncomfortable without benefit for a subset who found the process distressing without clear improvement
Important considerations
- Only do this under medical direction — self-dilatation without proper instruction and appropriate dilators can cause injury
- Lubricant is essential — generous application every time
- Never force progression — moving to a larger size should only happen when the current size is comfortable
- It is not a substitute for other treatment — self-dilatation is typically used alongside dietary management, sitz baths, and sometimes topical medication
- Stop if it is causing significant pain — discuss with your clinician rather than pushing through
The broader context
Self-dilatation sits in the treatment landscape between conservative self-care and surgical intervention. For some people, it provides enough sphincter relaxation to tip the balance toward healing. For others, it is a stepping stone — a trial that, if unsuccessful, helps clarify the case for botox or surgery.
If your clinician has recommended self-dilatation, it is worth trying with full commitment before judging its effectiveness. If it has been recommended and you have concerns or questions, discussing them openly with your clinician is the best approach.