The short explanation
These two tests help find out why infections keep happening and how best to treat them. A urine culture grows the bacteria from your urine in a lab and shows exactly which germ is causing the infection and which medicines work against it. This guides treatment and helps avoid medicines that will not work. An ultrasound of the kidneys and bladder looks for stones, structural changes, swelling of the kidneys, and how much urine is left in the bladder after you pass urine. Urine left behind can let bacteria grow and cause repeat infections.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- The culture is most useful when the sample is collected before starting any treatment, as a clean midstream sample. For the ultrasound, you may be asked to come with a full bladder and then pass urine during the scan.
- Depending on the results, your doctor may also check blood sugar or refer you to a urologist or urogynaecologist. Most women with repeat infections have normal scans, which is reassuring.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot interpret your results. Your doctor will explain them and plan next steps.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- What did the culture show, and do the bacteria respond to common treatments?
- Does the scan show any stones or urine left in my bladder?
- Do I need any further tests?
- What prevention plan would suit me?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Get help the same day
- Get care the same day if you develop fever, back pain or vomiting.
Book an appointment soon
- Get the culture sample done promptly when symptoms appear, before starting treatment.
Raise it at a routine appointment
- Return to your doctor for a routine review once both results are ready.
Sources
The evidence this explanation is built on.
- Urinary tract infections (UTIs) NHS
- Urinary tract infections MedlinePlus (NIH)
- Urinary tract infection — adults MedlinePlus (NIH)
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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