The short explanation
Yes, treat this as urgent. Being unable to pass urine for many hours with a swollen, painful lower belly suggests acute urinary retention, where the bladder is full but cannot empty. It is painful, and if it is not relieved the pressure can affect the kidneys. It usually needs a clinician to drain the bladder, often with a thin tube called a catheter, which brings quick relief. She should be seen in an emergency department or hospital casualty today, not given home remedies.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- In older women, causes can include severe constipation, some medicines such as those for allergies, cold, pain or mood, a urine infection, a prolapse pressing on the bladder outlet, recent surgery or anaesthesia, diabetes, or nerve problems.
- Take a list of her medicines and any recent hospital papers. Once the bladder is drained, the team will look for the cause and decide on follow-up.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot say why she cannot pass urine. That needs an examination, a bladder scan and tests at the hospital.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Is her bladder full, and how much was drained?
- What do you think caused this?
- Will she need to keep a catheter for a while?
- Could any of her medicines be contributing?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 or go to the nearest emergency department now if she cannot pass urine and her lower belly is swollen or painful, or if she becomes confused, feverish or very unwell.
Get help the same day
- If she is passing only small dribbles with a lot of discomfort, she still needs to be seen today.
Raise it at a routine appointment
- After the emergency is managed, book follow-up to treat the cause and prevent a repeat.
Sources
The evidence this explanation is built on.
- Urinary incontinence MedlinePlus (NIH)
- Urinary tract infection — adults MedlinePlus (NIH)
- Pelvic organ prolapse NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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