Seek immediate medical care

Unable to Pass Urine Right Now?

Go to a hospital or emergency facility now if you cannot pass urine, particularly if you have a painful or swollen lower abdomen. Acute urinary retention can damage the bladder or kidneys if pressure is not relieved.

Do not wait for a routine appointment.
Do not repeatedly force fluids in an attempt to make urine flow.
Do not take leftover medicines or stop prescribed medicines without medical advice.
If you also have fever, chills, weakness, vomiting or blood in urine, tell the medical team immediately.

What is Urinary Retention?

Urinary retention means the bladder does not empty properly. It may happen suddenly or develop gradually. The two patterns can feel very different.

Acute urinary retention A sudden inability to pass urine, often with a strong urge, increasing lower abdominal pain or a visibly swollen bladder. This is an emergency.

Chronic urinary retention The bladder remains partly full after urination over a longer period. Symptoms may be mild or absent even when a significant volume remains.

Some people with chronic retention can still pass small amounts of urine. Passing a little urine does not always mean the bladder is emptying safely.

What Symptoms Can Occur?

Unable to urinate No urine passes despite the urge or effort to empty the bladder.

Lower abdominal pain Increasing pressure, discomfort or severe pain above the pubic bone.

Weak or interrupted flow A slow stream that takes time to start or repeatedly stops and starts.

Incomplete emptying A persistent feeling that urine remains after finishing.

Chronic retention may also cause:

Passing small amounts of urine frequently.
Urgency with little success.
Straining or hesitancy.
Dribbling or leakage from an overfilled bladder—overflow incontinence.
Recurrent urinary infection or new bed-wetting.

What Can Cause Urinary Retention?

Retention may be caused by a physical blockage, reduced bladder muscle contraction, disruption of the nerves controlling the bladder, medicines or a combination of these factors.

Enlarged prostate Benign prostatic hyperplasia (BPH) is a common cause in men because it can obstruct the bladder outlet.

Narrowing or blockage Urethral stricture, a stone, blood clot, severe constipation, pelvic organ prolapse or another pelvic condition may obstruct urine flow.

Infection or inflammation Swelling related to urinary infection, prostatitis or another inflammatory condition can make urination difficult.

Nerve or bladder muscle problems Diabetes, spinal or neurological conditions, pelvic injury and reduced bladder muscle function can interfere with emptying.

Medicines Some cold and allergy remedies, antidepressants, anticholinergic medicines, opioids and other drugs can contribute in susceptible patients.

After an operation Anaesthesia, pain medicines, limited mobility and fluid changes can cause temporary postoperative retention.

Do not stop prescribed medicines by yourself. Bring a complete medicine list to the medical assessment.

How is the Bladder Drained?

The immediate priority in acute retention is to release the trapped urine. The medical team will choose the safest drainage method for the individual situation.

1 Urethral catheter

A soft tube is gently passed through the urethra into the bladder so urine can drain into a collection bag. This usually provides rapid relief from pressure and pain.

2 Suprapubic catheter when needed

If a urethral catheter cannot be passed safely or is unsuitable, urine may be drained through a catheter inserted through the lower abdomen directly into the bladder.

3 Monitoring after drainage

The urine volume, urine appearance, comfort, fluid balance and kidney function may be monitored, particularly after a large volume is drained.

Doctor's Insight

A catheter treats the immediate emergency, but it does not explain why retention happened. The cause still needs to be identified so that the catheter can be removed safely and recurrence can be reduced.

What Will the Medical Team Need to Know?

Explain when you last passed urine, whether the problem was sudden or progressive, and whether you have pain, fever, bleeding or neurological symptoms.

Previous urinary symptoms

A weak stream, hesitancy, frequency, urgency, night-time urination, infection, stones or a previous episode of retention may point towards the cause.

Recent events

Mention a recent operation, anaesthesia, injury, constipation, prolonged immobility or a newly started medicine.

Neurological warning symptoms

New leg weakness, numbness around the buttocks or genitals, severe back pain, or loss of bowel control requires immediate assessment for a possible spinal emergency.

How is the Cause Investigated?

Emergency treatment should not be delayed for a long list of tests. Once the bladder is safely drained, investigations are chosen according to the suspected cause.

1 History and examination

The abdomen, bladder, genital area, prostate when relevant, medicines and neurological function may be assessed.

2 Measure urine remaining

A bladder ultrasound or catheter can measure the post-void residual (PVR)—the urine left after an attempt to empty the bladder.

3 Urine and blood tests

Urinalysis or culture may look for infection or blood. Blood tests may assess kidney function, electrolytes and other relevant conditions.

4 Selected further tests

Ultrasound, additional imaging, urine flow testing, cystoscopy or urodynamic studies may be arranged when they will clarify the cause or guide treatment.

What Happens After the Emergency is Treated?

Some patients go home temporarily with a catheter and drainage bag. The team should explain catheter care, warning signs, medicines and the follow-up plan before discharge.

Trial without catheter (TWOC) When appropriate, the catheter is removed in a planned setting and the ability to urinate is assessed. Urine flow and residual urine may be checked before deciding whether removal was successful.

Medicine for prostate-related retention If BPH is suspected, an alpha-blocker may be prescribed before a planned TWOC to improve the chance of passing urine. It must be selected with attention to blood pressure and other medicines.

If the trial is unsuccessful The bladder may need to be drained again. Further catheter management and treatment of the cause are then planned with the urology team.

Cause-specific treatment Treatment may address an enlarged prostate, urethral stricture, infection, stone, constipation, medicine effect, pelvic condition or neurological problem.

Do not remove a urinary catheter yourself unless a qualified medical professional has specifically instructed and trained you to do so.

What Complications Can Occur?

Prompt drainage and appropriate follow-up help reduce the risk of complications. Possible problems include:

Bladder overstretching and reduced bladder muscle function.
Urinary tract infection.
Back-pressure on the kidneys and reduced kidney function.
Recurrent retention.
Catheter blockage, leakage, discomfort or bleeding.

If a catheter stops draining, severe bladder pain returns, fever develops, or you feel acutely unwell, seek prompt medical advice.

Myth vs Fact

Myth Drinking a large amount of water will force the urine out.

Fact Adding more fluid to an already full bladder can worsen pain and pressure. Acute retention requires urgent medical drainage.

Myth Passing a small amount means there is no retention.

Fact A person may pass small amounts while a large volume remains in the bladder. Residual urine can be measured when retention is suspected.

Myth A catheter permanently cures urinary retention.

Fact A catheter relieves the immediate problem. The underlying cause still requires evaluation and, when necessary, definitive treatment.

Frequently Asked Questions

Is urinary retention always painful?

Acute retention is often painful, but chronic retention can cause mild symptoms or no obvious pain. A weak stream, overflow leakage, repeated infection or incomplete emptying can still require assessment.

Will I have to stay in hospital?

Not everyone requires admission. The decision depends on the cause, kidney function, infection, urine volume drained, other medical problems and whether safe catheter care and timely follow-up are possible.

How long will the catheter remain?

This varies according to the cause and the condition of the bladder. Your clinician will plan the timing of a trial without catheter or longer-term drainage rather than using one fixed schedule for everyone.

Does acute retention always mean an enlarged prostate?

No. BPH is common in men, but retention can also result from urethral narrowing, infection, stones, medicines, surgery, constipation, neurological problems and other pelvic conditions.

Can urinary retention happen in women?

Yes. Although it is less common, women can develop retention after an operation or childbirth, from pelvic organ prolapse, medicines, urethral problems, neurological conditions or poor bladder contraction.

Unable to Pass Urine