Bladder, Bowel and Continence in MS: The Symptoms Nobody Mentions

Bladder, bowel and continence in MS: the symptoms nobody mentions

In early 2026, MS Australia surveyed 939 people about their experience of the NDIS. Among the things respondents reported being told by assessors was that there is no link between MS and continence issues.

There is. Bladder dysfunction affects the large majority of people with MS at some point, bowel dysfunction is close behind, and together they account for an enormous share of the distress, social withdrawal, hospital admissions and support need that MS produces. They are also the symptoms least likely to be raised in a fifteen-minute neurology appointment, because nobody wants to talk about them and nobody asks.

This guide is written plainly, because vagueness is part of the problem. It covers why MS affects the bladder and bowel, the infection issue that causes the most avoidable harm, what treatments exist, and what the Australian funding system actually provides.

Why MS does this

The bladder is controlled by a loop between the brainstem and the sacral spinal cord. Filling, storing and emptying require coordination between the bladder muscle (the detrusor) and the sphincter: when one contracts, the other must relax.

MS lesions in the spinal cord and brainstem interrupt that coordination. Three patterns result.

Overactive bladder (detrusor overactivity). The bladder contracts when it should be storing. This is the most common pattern and it produces urgency, frequency, nocturia — getting up at night — and urge incontinence. The bladder may signal urgently when it is nowhere near full.

Incomplete emptying (detrusor underactivity or retention). The bladder does not contract strongly enough, or does not fully empty. This produces hesitancy, a weak stream, a feeling of incomplete emptying, double voiding, and — importantly — a residual volume of urine sitting in the bladder.

Detrusor sphincter dyssynergia. The worst of both: the bladder contracts while the sphincter also contracts. The result is urgency with difficulty passing urine, high bladder pressures and significant residual volume.

The clinically critical point is that urgency and retention frequently coexist, and they feel like opposites. A person running to the toilet eight times a day may also be retaining 200ml. Treating the urgency with an anticholinergic — which relaxes the bladder — can worsen the retention and make everything worse. This is why guessing is a bad idea and measurement matters.

For the bowel, the same disruption produces constipation — slowed transit, weak abdominal muscles, reduced sensation, compounded by reduced mobility, reduced fluid intake (often deliberate, to control the bladder) and medication side effects. And faecal incontinence or urgency, from reduced sensation and sphincter control, which is frequently overflow from constipation rather than a separate problem.

Constipation also worsens bladder symptoms mechanically, and both worsen spasticity. The systems are coupled, which means fixing the bowel often improves the bladder.

The infection problem, which causes the most harm

If you take one thing from this guide, take this.

Incomplete bladder emptying leaves residual urine, and residual urine gets infected. Urinary tract infections are therefore very common in MS. And in MS, a UTI frequently presents with no urinary symptoms at all.

What it presents as instead: a wave of fatigue, worsening weakness, worse spasticity, confusion or cognitive fog, poor balance, falls, a low-grade temperature, or simply “she’s not herself.” Because infection raises core temperature, and raised core temperature worsens MS symptoms through Uhthoff’s phenomenon, a UTI can produce a convincing imitation of a relapse.

The consequences of missing this are serious and routine. People are admitted with suspected relapses and given intravenous methylprednisolone — a drug that suppresses the immune system — when what they have is a bacterial infection. Steroids in that situation make things worse. The false relapse also pollutes the relapse history that treatment decisions and NDIS applications depend on.

The rule: any sudden unexplained deterioration in a person with MS warrants a urine culture. Not a dipstick alone — dipsticks are unreliable in neurogenic bladders — a culture. Before steroids, before an MRI, before anybody says relapse.

The corresponding rule for support workers and families: if someone with MS is suddenly worse, say the words “could this be a urine infection?” to whoever is making decisions. It is a cheap question with a high hit rate.

A note on prevention, because advice here has shifted. Routine long-term prophylactic antibiotics are now used more cautiously because of resistance. What is used instead: ensuring the bladder actually empties, which is the root cause; adequate fluid intake, which people restrict for understandable reasons; methenamine hippurate, which has reasonable evidence and is not an antibiotic; and in some cases intravesical treatments or vaccines under urology supervision. Cranberry has weak evidence. Asymptomatic bacteriuria — bacteria in the urine with no symptoms — generally should not be treated, and over-treating it is a major driver of resistance in this population.

Getting it properly assessed

The pathway most people should be on and most people are not.

Ask for a continence assessment. The entry point is a continence nurse advisor, a urologist with neurogenic bladder experience, or a specialist continence physiotherapist. MS nurses through your state MS organisation can usually point you to the right local service. The National Continence Helpline (1800 33 00 66) is free and genuinely useful.

Insist on a post-void residual measurement. This is a quick bladder ultrasound immediately after passing urine, and it is the single most important test, because it distinguishes urgency from retention and determines what treatment is safe. Treating a neurogenic bladder without knowing the residual volume is guessing.

Consider urodynamics where the picture is complex or first-line treatment fails. It measures pressures and flow directly.

Get the kidneys checked if retention or high pressures are present. Untreated high-pressure retention can damage the upper urinary tract over years, and this is the reason continence management in MS is a medical issue rather than a dignity issue alone.

A bladder diary for three days — times, volumes, leaks, urgency, fluid intake — is the cheapest and most informative thing you can bring to the appointment.

What treatments exist

For overactive bladder

Bladder retraining and timed voiding. Going on a schedule rather than waiting for urgency. Unglamorous and effective, taught by continence physiotherapists and nurses.

Pelvic floor exercises, where there is enough function to recruit the muscles. Delivered properly by a pelvic health physiotherapist, not from a pamphlet.

Anticholinergic medications — oxybutynin, solifenacin, darifenacin and others — relax the bladder. Effective, and with two caveats that matter in MS. They worsen retention, so the residual volume must be known first. And they have cognitive side effects; anticholinergic burden is a recognised, reversible cause of cognitive impairment, which in a population already dealing with MS cognitive change is a real trade-off. Mirabegron works by a different mechanism and avoids the anticholinergic load, which makes it worth asking about.

Botulinum toxin injections into the bladder wall. Highly effective for refractory detrusor overactivity, repeated every six to twelve months, and well established in neurogenic bladder. It frequently necessitates intermittent catheterisation afterwards, which people should know in advance.

Desmopressin for nocturia specifically, with careful sodium monitoring.

For incomplete emptying

Intermittent self-catheterisation is the mainstay, and it is far less awful than it sounds. A thin single-use catheter, passed several times a day, emptying the bladder completely. It dramatically reduces infections, protects the kidneys, and for many people reduces urgency enough to transform daily life. Most people learn it in one or two sessions with a continence nurse.

The barrier is almost always psychological, and the thing that helps is talking to somebody who does it. People who have been catheterising for a year generally describe it as the single best intervention they made.

Indwelling catheters — urethral or suprapubic — are used where self-catheterisation is not feasible, often because of hand function, cognitive change or carer availability. Suprapubic catheters, placed through the abdominal wall, are generally preferred for long-term use: easier to manage, better for sexual function, less urethral damage. They carry higher infection and stone risk than intermittent catheterisation, so they are a considered choice rather than a default.

Where catheterisation is done by a support worker, it is a high intensity support under the NDIS Practice Standards, with specific worker competency, training and supervision requirements, including annual reassessment. Our high intensity supports guides set out what a provider is actually obliged to do, and it is worth checking that your provider does it.

For the bowel

The principle is to produce a predictable, complete bowel movement at a chosen time rather than an unpredictable one.

A bowel routine, usually daily or every second day, at the same time, exploiting the gastrocolic reflex 20 to 30 minutes after a meal. Boring, effective, and the foundation of everything else.

Fibre and fluid, with the caveat that fibre without fluid makes constipation worse, and that fluid restriction to manage the bladder is extremely common and counterproductive. If someone is restricting fluid, the bladder needs fixing first.

Oral laxatives — osmotic agents such as macrogol, and stimulants — titrated rather than used reactively.

Suppositories and enemas to trigger and complete evacuation at the chosen time.

Transanal irrigation for more significant dysfunction, which can be highly effective and requires training.

Abdominal massage and positioning, which have modest but real evidence.

Digital stimulation or evacuation, which is complex bowel care — one of the eight core high intensity support skills — with the same competency requirements as catheterisation.

Constipation is also a frequent cause of sudden deterioration in MS. A person who is suddenly worse, more spastic, or more confused may be severely constipated. It belongs on the same checklist as infection.

The social and emotional part, which is most of it

Clinically, bladder and bowel symptoms are manageable. Practically, they are the symptoms that shrink people’s lives, and the mechanism is fear.

Someone who has had one accident in public will start mapping toilets, then avoiding places without them, then declining invitations, then not leaving the house. This happens quietly and is rarely volunteered. Rates of social withdrawal attributable to continence are high and under-measured, and the 2026 MS Australia survey’s finding that people with MS feel the NDIS does not understand their condition is partly about exactly this — invisible symptoms with enormous functional consequences.

Things that genuinely help:

A continence plan that works is the main event. Fear of accidents reduces when accidents stop.

Products that are actually suited to the person, fitted properly, rather than whatever was supplied. Modern continence products are discreet and effective; people are often using the wrong thing.

A National Public Toilet Map check before going somewhere, and knowledge of the MLAK key scheme, which gives access to locked accessible toilets across Australia.

An honest conversation with one or two people so that leaving early does not need explaining each time.

Psychology input where this has become avoidance, at $252.99 per hour under the 2026–27 price limits.

Sexual function, which is tightly linked and even less discussed. Bladder and bowel symptoms, spasticity, fatigue, sensory change and some medications all affect sexual function in MS, and there are real interventions. A continence nurse or urologist will raise it if asked; almost nobody raises it unprompted.

What funding is available in Australia

There are three separate systems and most people use fewer than they are entitled to.

The Continence Aids Payment Scheme (CAPS) is a Commonwealth payment toward the cost of continence products for eligible people with permanent and severe incontinence. It is an annual payment, it is not means tested, and it is administered by Services Australia. MS qualifies where the criteria are met. A great many eligible Australians with MS are not claiming it.

State continence schemes provide products or subsidies and vary considerably — worth asking your continence nurse what exists in your state.

The NDIS funds continence-related supports as part of a plan: continence products as consumables, assistive technology, continence assessment by an appropriate clinician, and the support worker time for catheterisation or bowel care. Where a support worker performs catheterisation or complex bowel care, those are high intensity supports with associated price arrangements and competency requirements.

The interaction between CAPS and the NDIS causes confusion. In general, NDIS participants have continence consumables funded through their plan rather than CAPS, and people who are not NDIS participants use CAPS. Check rather than assume, because being told the wrong thing by one agency is common.

Registered nursing sits at $128.05 per hour in 2026–27, which is relevant where a nurse rather than a support worker is required — for suprapubic catheter changes, for instance, or for initial training and competency sign-off.

What to make sure is in a plan: a continence assessment, the products, the support worker time at the correct high intensity rate where relevant, and — the one that gets missed — the clinical oversight and annual competency reassessment that the Practice Standards require for high intensity supports. A provider delivering catheterisation without that is non-compliant, and it is a reasonable thing to ask about.

What support workers need to know

Continence support is dignity work, and the tone is the job. Matter-of-fact, unhurried, private, no commentary. The person has almost certainly had worse experiences than this one.

Follow the plan exactly. Catheterisation and bowel care are high intensity supports with documented protocols for a reason. If you have not been trained and signed off on this person’s protocol, you should not be doing it, and saying so is the correct response.

Clean technique matters. Infection risk in this population is high and preventable.

Record intake and output where asked, and record it accurately. These numbers drive clinical decisions.

Watch for the signs of infection: sudden fatigue, increased spasticity, confusion, cloudy or strong-smelling urine, low-grade fever, a change in continence pattern, falls. Report them as possible infection, not as behaviour or decline.

Watch for constipation and report the actual pattern rather than “seems constipated.” Days since last bowel movement is data.

Never restrict fluids to make continence management easier. It causes infections and worsens constipation, cognition and fatigue.

Respond immediately to urgency. When someone with MS says they need the toilet, the window is short and the consequences of delay are humiliating. This is not a request that can be queued.