What is Overactive Bladder?
Overactive Bladder is defined by a sudden and difficult-to-control urge to urinate, often resulting in frequent toilet visits and waking during the night to use the bathroom. In some cases, leakage may occur before reaching the toilet - a symptom known as urge incontinence. As defined by the International Continence Society, OAB is diagnosed when these symptoms appear without an infection or other underlying condition.
OAB becomes more common with age, but it can affect people at any stage of life. Research shows that around 11–16% of adults live with OAB, and the number rises to more than 30% in people over 65. In most instances, women are more affected than men.
What causes over-active bladder?
The bladder muscle normally contracts only when the bladder is full and ready to empty. With OAB, the muscle contracts too early, creating a sudden and strong urge to urinate even when the bladder contains only a small amount of urine.
There are several possible causes. Lifestyle factors such as high fluid intake, large amounts of caffeine or alcohol, smoking and stress can all contribute to urgency and frequency. Daily habits that overstimulate the bladder may also make symptoms feel more intense.
Medical conditions like diabetes, constipation, obesity and certain neurological diseases can influence how the bladder functions. In men, an enlarged prostate may block the urinary tract and increase pressure on the bladder, which can lead to OAB-like symptoms. This may be due to benign prostate enlargement, which becomes more common with age, or because of prostate cancer. Both situations can affect the bladder and should be assessed by a healthcare professional.
In women, pregnancy and hormonal changes after menopause are known triggers. When estrogen levels drop, the tissues in the bladder and urethra become thinner and more sensitive, which may contribute to the symptoms of OAB.
How is overactive bladder diagnosed?
Because the symptoms of OAB can overlap with other conditions, diagnosis is important. Doctors may ask patients to keep a bladder diary, perform a physical examination, and run urine tests to rule out infection. In some cases, additional tests such as bladder scans or urodynamics are used. These approaches are recommended in clinical guidelines published by the American Urological Association and the European Association of Urology.
How is overactive bladder treated?
Treatment often begins with lifestyle and behavioural changes. These may include:
- training the bladder by gradually extending the time between bathroom visits
- strengthening the pelvic floor with targeted exercises
- adjusting fluid intake and diet
- losing weight if needed
- stopping smoking
If these measures are not enough, medicines that help relax the bladder muscle may be used. They can be effective, but some people experience side effects such as dry mouth, constipation, or headaches.
For more persistent or severe symptoms, additional treatment options such as Botox injections in the bladder muscle or nerve stimulation may be considered.
When to seek help
Although OAB is common, it should not be considered a normal part of ageing. Contact a healthcare professional if:
- symptoms worsen rapidly
- you notice blood in the urine
- urination becomes painful
- you experience frequent urinary tract infections
These signs may indicate another or more serious underlying condition that requires further evaluation.
For additional guidance and support, contact your GP.
Everyday support and continence care
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