Urinary Retention

Urinary Retention

Urinary retention occurs when the bladder cannot empty completely or at all. It can develop suddenly (acute) or gradually over time (chronic) and may cause discomfort, a weak urine stream, or frequent urination without complete relief. Causes include obstruction, nerve problems, medications, or weakened bladder muscles. Management depends on the underlying cause and may involve catheterisation, medications, or surgery.

Overview | Symptoms & Causes | Diagnosis | Treatment Options

What is Urinary Retention?

Urinary retention occurs when the bladder is unable to empty completely. Normally, the bladder stores urine until the muscles of the bladder wall (detrusor) contract and the sphincter muscles relax to allow urine to pass through the urethra. This process is controlled by nerves that coordinate bladder function.

Urinary retention can be acute (sudden and painful inability to pass urine) or chronic (gradual difficulty emptying the bladder fully). It can lead to bladder discomfort, urinary tract infections, and, if untreated, kidney problems. The condition can affect both men and women, although causes often differ between sexes.

Understanding Urinary Retention

Urinary retention can present in different ways depending on whether it is acute or chronic. Common symptoms include:

Difficulty starting to urinate or a weak urine stream.
Feeling that the bladder is not completely empty after urinating.
Frequent urination in small amounts, or a sudden urge to urinate.
Abdominal or lower pelvic discomfort or a feeling of fullness.
In acute cases, sudden inability to pass urine, which can be painful and requires urgent medical attention.

Some people with chronic retention may not notice significant discomfort initially, but the bladder can gradually stretch and weaken over time, leading to other complications.

Urinary retention occurs when the bladder is unable to empty properly, and it can be caused by a variety of factors:


Obstruction	Blockages such as an enlarged prostate in men, urethral strictures, or bladder stones can prevent normal urine flow.
Nerve problems	Conditions affecting the nerves that control the bladder, such as diabetes, spinal cord injuries, multiple sclerosis, or stroke, can interfere with bladder function.
Medications	Certain drugs, including some antihistamines, decongestants, antidepressants, and medications used for overactive bladder, can contribute to retention.
Post-surgical effects	Anesthesia or pelvic surgery can temporarily impair bladder function.
Other risk factors	Older age, male sex (particularly with prostate enlargement), and underlying medical conditions that affect nerve or muscle function can increase the likelihood of urinary retention.

Diagnosing Urinary Retention

Diagnosis usually begins with a detailed medical history and clinical examination. Your healthcare provider will ask about your urinary symptoms, medication use, and any relevant medical conditions.

Investigations may include:


Blood & Urine Tests	These check for infections, kidney function, and other conditions that may affect urination.
Ultrasound	A non-invasive imaging test that visualizes the bladder, kidneys, and sometimes prostate or uterus, helping identify structural issues or retained urine.
CT Scan	Provides detailed images of the urinary tract to detect stones, tumors, or anatomical abnormalities that could be causing retention.
Cystoscopy	A procedure using a small camera to look directly inside the bladder and urethra, allowing the doctor to identify any blockages or structural issues.
Urodynamic Studies	Special tests that measure how well the bladder and urethra store and release urine, helping pinpoint functional problems.

Treatment Options

The treatment for urinary retention depends on the underlying cause and whether it is acute (sudden) or chronic (long-term).


Catheterisation	In acute cases, a catheter may be inserted to drain the bladder and relieve discomfort. This can be temporary while the underlying cause is addressed.
Medications	Certain drugs can help relax the bladder or relieve an enlarged prostate, reduce inflammation, or treat infections contributing to retention.
Surgery or procedures	If retention is caused by structural problems such as an enlarged prostate, strictures, or other blockages, surgical intervention may be needed to remove or correct the obstruction.
Lifestyle & supportive measures	For some people, strategies such as timed voiding, fluid management, pelvic floor exercises, and managing underlying conditions (e.g., diabetes) can help improve bladder function and prevent recurrence.

How can Lanthorn help?

Urinary Tract Ultrasound - £300

A non-invasive scan to assess the bladder, kidneys, and urinary tract. It helps identify blockages, structural changes, or causes of retention and can measure residual urine after voiding.

Book now

Urinary Tract CT Scan - From £450

Provides a more detailed view when further assessment is needed, helping to detect stones, strictures, or other anatomical issues that may contribute to retention.