Ryan Stewart, DO
Fellowship-Trained Urogynecologist
Urogynecology & Reconstructive Pelvic Surgery
Green Bay, Wisconsin
✓ Medically reviewed March 2026

Does Sacral Neuromodulation Help with Bowel Control?

Yes — sacral neuromodulation (SNM) is FDA-approved for fecal incontinence and is one of the most effective advanced treatments available. The same device used for overactive bladder (InterStim) also regulates the nerves controlling bowel function, making it an excellent option for women with accidental bowel leakage — and especially for those with both bladder and bowel symptoms.

How It Helps

SNM modulates the sacral nerves that control the muscles and sensation of the rectum, anal sphincter, and pelvic floor. By restoring more normal nerve signaling, it can:

Reduce or eliminate episodes of accidental bowel leakage
Improve the ability to sense when the rectum is full
Improve anal sphincter function
Reduce urgency and the need to rush to the bathroom

Sacral neuromodulation is particularly valuable because it treats fecal incontinence through a different pathway than muscle strengthening. Even when the muscles are damaged, improving the nerve signals can restore functional control.

The Trial Period

Just like with bladder applications, SNM for fecal incontinence includes a trial period. A temporary wire is placed and tested for 1-2 weeks. If you experience at least 50% improvement in episodes, the permanent device is implanted.

Results

80-90% of patients who respond to the trial maintain long-term improvement
Many patients achieve complete continence
Benefits extend to quality of life, confidence, and social activity

For women dealing with both bladder and bowel incontinence, SNM is uniquely valuable — one device can treat both conditions. It’s one of the most rewarding treatments I perform.

← Learn more about Fecal Incontinence

Frequently Asked Questions

Can one device treat both bladder and bowel problems?

Yes. Sacral neuromodulation is FDA-approved for both overactive bladder/urge incontinence and fecal incontinence. One device can address both conditions simultaneously.

What if the trial doesn't work?

If the trial period doesn't show sufficient improvement, the temporary wire is simply removed. No permanent changes have been made, and other treatment options remain available.

Is the surgery for bowel SNM different from bladder SNM?

No. The procedure is identical — the same device, same nerve target, same trial process. The sacral nerves control both bladder and bowel function.