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

Understanding Overactive Bladder (OAB)

Overactive bladder is one of the most common conditions I treat. Patients describe it in different ways: rushing to the bathroom all day, not making it in time, mapping out every restroom before leaving the house. Whatever it looks like for you, the pattern is the same. Your bladder is calling the shots, and it’s running your life.

OAB isn’t a disease. It’s a group of urinary symptoms, and it’s not just a normal part of aging. It’s also very treatable.

What are the Symptoms?

The main symptoms are:

Urgency: a sudden, strong need to urinate that’s hard to put off, even when your bladder isn’t full.
Frequency: going to the bathroom more than about 7 times during the day.
Nocturia: waking up more than once at night to urinate.
Urge incontinence: leaking urine when that sudden urge hits before you can get to the bathroom.

Not everyone with OAB has all four symptoms. Some patients have urgency and frequency without any leaking. Others wake up multiple times at night but do fine during the day.

How Does a Normal Bladder Work?

It helps to understand what’s supposed to happen:

Your kidneys produce urine, which drains into the bladder.
As the bladder fills, the walls stretch, and you gradually become aware that you need to go.
You can hold it until it’s convenient.
When you’re ready, your brain signals the pelvic floor muscles and urethral sphincter to relax, and the bladder muscle contracts to push urine out.

Most people urinate about 4–7 times per day and no more than once at night.

What Causes OAB?

In OAB, the bladder muscle contracts when it shouldn’t, before the bladder is full or at times when you’re not ready. That’s what creates the urgency.

Common causes and risk factors include:

Urinary tract infections
Bladder stones or growths
Neurological conditions (stroke, Parkinson’s, MS)
Constipation and pelvic floor dysfunction
Obesity
Caffeine and alcohol intake
Previous pelvic surgery

For many patients, though, we don’t find a single identifiable cause. That doesn’t mean we can’t treat it effectively. It just means the workup may not point to one specific thing.

How is OAB Diagnosed?

When I evaluate a patient for OAB, I start with a conversation about your symptoms, fluid intake, medical history, and how your bladder is affecting your daily life. From there, the workup typically includes:

A physical examination
A urine test to rule out infection or blood
A bladder diary, a simple log of when and how much you drink and urinate over a few days

Sometimes I’ll also check a post-void residual (how much urine is left in the bladder after you go) or recommend urodynamic testing to get a more detailed picture of how the bladder is functioning. Not every patient needs these. It depends on what we find initially.

Treatment Options

I approach OAB treatment as a conversation, not a checklist. The 2024 AUA/SUFU guideline moved away from a rigid stepwise approach and toward shared decision-making, which fits how I like to practice. We talk through your goals, your preferences, and what fits your life, and build a plan together.

Behavioral and lifestyle changes

For many patients, these are enough on their own.

Fluid management means cutting back on caffeine, alcohol, and carbonated drinks, and aiming for a reasonable daily fluid intake (typically 1.5–2 liters).

Bladder training involves gradually increasing the time between bathroom visits to retrain your bladder to hold more comfortably.

Pelvic floor physical therapy is about strengthening and coordinating the muscles that support bladder control. This goes well beyond Kegels. I have pelvic floor PTs in my office, and I refer to a network of therapists across the region.

Medications

There are two main classes of medications for OAB.

Beta-3 agonists (mirabegron, vibegron) relax the bladder muscle during filling. They tend to be well tolerated and are often my first choice for medication.

Antimuscarinics (oxybutynin, tolterodine, solifenacin, and others) block the nerve signals that cause the bladder to contract. They can be effective, but side effects like dry mouth and constipation are common. There’s also growing evidence linking long-term antimuscarinic use to cognitive risks, particularly in older adults, so I discuss this carefully with each patient.

Advanced treatments

When behavioral changes and medications aren’t enough, there are other options.

Botulinum toxin (BOTOX®) injections are injected directly into the bladder muscle in the office to reduce involuntary contractions. Effects typically last 6–9 months.

Tibial nerve stimulation uses electrical stimulation to modulate the nerve signals controlling the bladder. It’s minimally invasive and done in the office.

Sacral neuromodulation is a small implanted device that continuously modulates the sacral nerves. Think of it like a pacemaker for the bladder.

Which option makes sense depends on your symptoms, what you’ve already tried, and what matters most to you. OAB isn’t dangerous, but it can take a real toll on daily life.

References

Cameron AP, Engel WJ, Engel CJ, et al. The AUA/SUFU guideline on the diagnosis and treatment of idiopathic overactive bladder. J Urol. 2024;212(1):11-20. doi:10.1097/JU.0000000000003985
Coyne KS, Sexton CC, Vats V, Thompson CL, Kopp ZS, Milsom I. National community prevalence of overactive bladder in the United States stratified by sex and age. Urology. 2011;77(5):1081-1087. doi:10.1016/j.urology.2010.08.039
National Institute of Diabetes and Digestive and Kidney Diseases. Bladder Control Problems (Urinary Incontinence). Accessed 2026.

Frequently Asked Questions

What is Overactive Bladder (OAB)?

Overactive Bladder is not a disease, but a group of urinary symptoms including urgency, frequency, nocturia, and sometimes urge incontinence. It affects both women and men of all ages and is not simply a result of getting older.

What are the key symptoms of OAB?

The key symptoms of OAB include: 1. Urgency: A sudden, intense need to urinate that you can't ignore. 2. Frequency: Urinating many times during the day (usually more than 7). 3. Nocturia: Waking up more than once at night to urinate. 4. Urge Incontinence: Sometimes leaking urine when you feel the sudden urge.

How does a normal bladder work?

A normal bladder fills with urine from the kidneys, and as it fills, the bladder walls stretch. You start to feel the need to urinate but can hold it. When ready, your brain signals the pelvic muscles and urethral sphincter to relax and the bladder muscle reflexively squeezes, allowing urine to flow out. This typically happens about 4-7 times per day and once at night.

What causes OAB?

In OAB, the bladder muscle contracts when it shouldn't — before the bladder is full or at inappropriate times. Contributing factors include urinary tract infections, bladder stones or growths, neurological conditions, constipation, pelvic floor dysfunction, obesity, and caffeine or alcohol intake. For many patients, no single cause is identified, but effective treatments are still available.

How is OAB diagnosed?

Diagnosis typically involves discussing your bladder habits, fluid intake, and general health with a doctor, a physical examination, urine tests, and filling out a bladder diary. Additional tests might include measuring residual urine, cystoscopy, and urodynamics to examine bladder muscle activity.

What are the treatment options for OAB?

Treatment is personalized based on your goals and preferences. Options include lifestyle changes (fluid management, bladder training), pelvic floor physical therapy, medications (beta-3 agonists like mirabegron or vibegron, or antimuscarinics), BOTOX® injections into the bladder, and nerve stimulation techniques like tibial nerve stimulation or sacral neuromodulation.

Is OAB dangerous?

While OAB can be frustrating, it's not dangerous. With the right treatment plan, most people can significantly improve their symptoms and quality of life.

Should I see a doctor if I think I have OAB?

Yes. OAB is very treatable, and a specialist can evaluate your symptoms, identify contributing factors, and work with you to build a treatment plan that fits your life and goals.