Urinary
Difficulty passing urine
Trouble starting to pass urine, a weak or stop-start stream, straining or a feeling the bladder has not emptied, most often from an enlarged prostate or an infection — but which when you cannot pass urine at all, with a painful full bladder, is an emergency.
Education and reference only. This explains the common causes of difficulty passing urine and the warning signs that need urgent help, in plain language — it is not a diagnosis or a substitute for advice from a clinician. If you feel very unwell or are worried, seek medical help.
Quick answer
What is difficulty passing urine?
Difficulty passing urine covers a range of problems with getting urine out: a delay in starting, a weak or interrupted flow, straining, dribbling at the end, or a sense that the bladder is not emptying fully. In men, by far the commonest reason is an enlarged prostate, which sits around the urethra and squeezes it as it grows with age, giving a poor stream and the need to strain.
- Get urgent help: Go to A&E if you are completely unable to pass urine and your bladder feels painfully full and swollen — this is acute urinary retention and needs emergency relief. Call 999 if difficulty passing urine comes with new back pain and numbness or weakness in the legs, or numbness around the back passage or genitals — this can mean a serious nerve problem (cauda equina).
- Self-care: If a clinician has confirmed a non-urgent cause such as a mildly enlarged prostate, some simple measures can ease the symptoms — but they never apply when you cannot pass urine at all.
About difficulty passing urine
Difficulty passing urine covers a range of problems with getting urine out: a delay in starting, a weak or interrupted flow, straining, dribbling at the end, or a sense that the bladder is not emptying fully. In men, by far the commonest reason is an enlarged prostate, which sits around the urethra and squeezes it as it grows with age, giving a poor stream and the need to strain. Infection and inflammation of the bladder or prostate can make passing urine difficult and uncomfortable, and a stone can block the flow. An overactive or, conversely, an underactive bladder can also disturb the normal pattern. The key danger to recognise is acute urinary retention: a sudden, complete inability to pass urine despite a painfully full bladder needs emergency treatment to relieve it. Rarely, difficulty passing urine alongside new back pain with numbness or weakness in the legs or around the back passage can signal a serious nerve problem and is also an emergency.
When to get help
Call 999 or go to A&E if difficulty passing urine comes with any of these warning signs:
- Go to A&E if you are completely unable to pass urine and your bladder feels painfully full and swollen — this is acute urinary retention and needs emergency relief.
- Call 999 if difficulty passing urine comes with new back pain and numbness or weakness in the legs, or numbness around the back passage or genitals — this can mean a serious nerve problem (cauda equina).
- Seek urgent help for difficulty passing urine with fever, shivering, back or flank pain and feeling very unwell, which can mean a kidney infection or blood poisoning.
- Seek urgent help for difficulty passing urine with blood in the urine or severe lower-tummy pain.
- See a doctor promptly for a steadily worsening weak stream, straining and incomplete emptying so the cause can be assessed.
When to see a doctor
Being completely unable to pass urine with a painful, full bladder is an emergency — go to A&E, as the bladder needs relieving urgently. Call 999 if difficulty passing urine comes with new back pain and numbness or weakness in the legs or around the back passage, which can signal a serious nerve problem. Seek urgent help for difficulty with fever, severe pain or blood in the urine. For a gradually worsening weak stream, hesitancy or incomplete emptying without these emergency features, book an appointment so the cause, such as an enlarged prostate, can be assessed and managed.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
What can cause it
Common causes of difficulty passing urine
Difficulty passing urine has many possible causes. Each links to a full, plain-language guide to that condition — what it is, how it's treated and when to seek help.
What helps
Self-care and what you can do
If a clinician has confirmed a non-urgent cause such as a mildly enlarged prostate, some simple measures can ease the symptoms — but they never apply when you cannot pass urine at all. Give yourself time and privacy in the toilet and try not to rush or strain, and a relaxed posture can help the flow start. Spreading fluids evenly through the day rather than drinking a lot at once, and cutting back on caffeine, fizzy drinks and alcohol, can reduce bladder irritation; reducing fluids in the couple of hours before bed eases night-time trips. Double voiding — waiting a moment after passing urine and then trying again — can help empty the bladder more fully. Staying active and keeping to a healthy weight also help. Report any worsening, fever, blood in the urine, or an inability to pass urine straight away.
Answers
Difficulty passing urine: frequently asked questions
What does it mean if I suddenly cannot pass urine at all?
A sudden, complete inability to pass urine with a painful, swollen bladder is called acute urinary retention and is an emergency. Go to A&E, as the bladder needs to be drained urgently to relieve it and prevent harm to the kidneys.
Why is my urine stream weak?
In men, the commonest reason is an enlarged prostate squeezing the urethra, which causes a weak, stop-start stream, hesitancy and straining. Infection, inflammation or a stone can also affect the flow. A clinician can examine you and arrange any tests needed.
Can difficulty passing urine be a sign of a serious nerve problem?
Rarely, yes. Difficulty passing urine together with new back pain and numbness or weakness in the legs, or numbness around the back passage or genitals, can signal a serious nerve condition called cauda equina, which is a 999 emergency.
What can I do to help a weak urine flow?
If a serious cause has been ruled out, give yourself time and privacy, avoid straining, try double voiding, spread fluids through the day, and cut down on caffeine, fizzy drinks and alcohol. Report any worsening, fever, blood in the urine or inability to pass urine straight away.
Sources
Where this is drawn from
- NICE CKS: Lower urinary tract symptoms in men.
- British Association of Urological Surgeons.
Related symptoms
Tell us what you need. We'll route it to the right expert.
Request a proposal, book a scoping call, or speak to our team directly.