Understanding Bladder and Bowel Changes in Neurological Conditions
Why stroke, MS, and Parkinson’s affect pelvic health—and what you can do about it
When we think about neurological conditions like Stroke, Multiple Sclerosis, or Parkinson’s disease, symptoms like mobility challenges, tremors, or fatigue often come to mind first.
But there’s another side that doesn’t get talked about nearly enough: bowel and bladder function.
In a recent conversation with board certified physiotherapist in pelvic health and oncology, Carina Siracusa, we explored how and why these symptoms show up—and what both clinicians and patients can do about them.
For many people living with neurological conditions, changes in bladder control, urgency, constipation, or incontinence can be some of the most frustrating—and least discussed—symptoms. And because these issues are often misunderstood or overlooked, people may not realize that help is available.
Let’s break down what’s really going on, and how better understanding can lead to better management.
First, How Does the System Normally Work?
Before we talk about dysfunction, it helps to understand the basics. As Siracusa explains, bladder and bowel function rely on a team effort between:
The brain
The spinal cord
The bladder and bowel
The pelvic floor muscles
For the bladder, the process is relatively straightforward:
The bladder fills and senses fullness
That signal travels up the spinal cord to the brain
The brain decides: Is now a good time to go?
A signal is sent back down to either hold or release
If everything is working well, this system feels automatic and predictable.
But if there’s a disruption anywhere along that pathway—whether in the brain, spinal cord, or nerves—the system can break down.
What Changes with Neurological Conditions?
Siracusa shares a helpful way to think about it is this. There are two main types of problems:
Interpretation issues: The brain receives the signal but doesn’t respond appropriately
Transmission issues: The signal doesn’t travel properly in the first place
Depending on the condition, one (or both) of these can be affected.
Stroke: When the “Switch” Is Disrupted
In a Stroke, damage occurs in a specific area of the brain due to reduced blood flow. The effects depend heavily on where the stroke happens. For example:
If the communication center is affected, the bladder may empty without warning
If the decision-making area is affected, the person may not respond to fullness signals in time
Common bladder challenges:
Urgency or leakage
Difficulty controlling timing
Reduced awareness of bladder fullness
What helps:
Timed voiding (going on a schedule instead of waiting for the urge)
Pelvic floor exercises (for support, not full control)
Medication in some cases
Bowel issues after stroke are often less about the nervous system directly and more about:
Reduced mobility
Difficulty getting to the bathroom
Changes in routine
Decreased fluid intake (swallowing issues, habits) contributing to constipation
Multiple Sclerosis: When Signals Slow Down
Multiple Sclerosis affects the protective coating of nerves (myelin), slowing down communication in the nervous system. Siracusa describes it like a frayed electrical wire—the message still gets through, but not reliably.
Common bladder patterns:
Delayed sensation (you don’t feel the urge until it’s urgent)
Overflow incontinence (the bladder gets too full and leaks)
Increased frequency
A key factor: fatigue. MS-related fatigue doesn’t just affect energy—it affects muscle performance, including the pelvic floor.
What helps:
Scheduled bathroom visits (don’t rely on sensation alone)
Energy management (avoid over-fatiguing muscles)
Pelvic floor training—but done at optimal times (not when exhausted)
Addressing constipation and diet
Siracusa points out that interestingly, for many people with MS, education alone can make a huge difference. Small changes—like adjusting timing or improving bowel habits—can significantly reduce symptoms.
Parkinson’s Disease: When Control Signals Are Reduced
In Parkinson’s disease, the brain produces less dopamine—a key chemical involved in controlling movement and bladder function.
Common bladder symptoms:
Urgency
Frequent urination
Feeling like you always need to go
Unlike other conditions, leakage isn’t always the main issue—the constant urge is.
Why this happens:
Dopamine helps the bladder store urine. Without it, the bladder becomes overactive.
What helps:
Medication (often essential here)
Fluid and bladder habit education
Functional strategies (easy-to-remove clothing, accessible bathrooms)
Constipation is also common, often due to:
Slowed movement
Muscle rigidity
Reduced activity
It’s Not Just the Pelvic Floor
One of the biggest misconceptions is that these issues are purely a pelvic floor problem.
In reality:
The pelvic floor may be working fine—but the control system around it isn’t.
This is why traditional approaches don’t always work the same way in neurological populations.
That said, strengthening the pelvic floor can still help—but it’s just one piece of a bigger puzzle.
Surprising Ways Therapy Helps
Even if you’re not a pelvic health specialist, there’s a lot you can do:
Movement matters: Exercises for balance, strength, and coordination also improve pelvic floor function.
Breathing helps: The diaphragm and pelvic floor work together—so breathing exercises support both.
Dual-task training works: Doing physical + mental tasks together (like balancing while tossing a ball) can improve pelvic coordination.
Education is powerful: Sometimes the biggest breakthroughs come from:
Adjusting bathroom timing
Improving fiber and hydration
Choosing the right incontinence products
The Missing Piece: Talking About It
Here’s the reality:
Many patients don’t bring up bladder or bowel issues
Many providers don’t ask
And yet, these symptoms can have a huge impact on quality of life.
If you’re a clinician:
Ask the question.
If you’re a patient:
Bring it up—even if it feels uncomfortable.
These issues are common, expected, and treatable (or at least manageable).
A Shift in Expectations
One of the most important takeaways that Dr Siracusa and I summarized:
The goal isn’t always to “fix” the problem—it’s to understand and manage it.
When people understand why something is happening, it becomes much easier to:
Accept support strategies
Use tools like timed voiding
Consider medications when needed
Final Thoughts
Bladder and bowel changes in neurological conditions are incredibly common—but they don’t have to be ignored or misunderstood.
With the right combination of:
Education
Therapy
Medical support
Practical strategies
People can regain a sense of control, confidence, and comfort in their daily lives.
Find a physiotherapist in your area that can help you integrate this information in a way that is individualized for YOU.
A special thanks to Dr. Carina Siracusa for sharing her expertise and helping bridge the gap between neurological care and pelvic health. Her work highlights just how powerful education and collaboration can be in improving quality of life for this population.
About Dr. Carina Siracusa
Dr. Carina Siracusa has been a practicing physical therapist since she graduated from Ohio University with her doctorate in physical therapy in 2005. She has practiced in the areas of pediatric, neurologic, oncologic, and pelvic floor physical therapy in her tenure as a physical therapist. She currently works in the neurologic rehab department at OhioHealth in Columbus, Ohio, seeing patients of all ages and abilities with pelvic floor dysfunction. She also serves as the oncology rehabilitation coordinator and the wheelchair clinic coordinator in this hospital system. She has been teaching for the Academy of Pelvic Health Physical Therapy since 2010 in the pelvic health series. She has also taught as adjunct clinical faculty at several universities. She has given multiple presentations all over the world on the topics of neurologic and pediatric pelvic health. She also teaches several two-day courses on the subjects of pediatric and neurologic pelvic health.
Instagram: @carinadpt
