The short explanation
Yes, a repeat test is usually sensible. During or just after a period, blood from the vagina can easily get into a urine sample, so a positive result for blood at that time is often due to contamination rather than a problem in the urinary tract. Most doctors recommend repeating the urine test when you are not bleeding, usually about a week or more after the period ends, with a clean midstream sample. If the repeat test is clear, no further action is usually needed.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- If blood is still present on the repeat test, your doctor may look for causes such as a urine infection, kidney stones or kidney inflammation, and may suggest a culture, blood tests or an ultrasound.
- Tell the doctor about any pain, burning, visible blood, blood-thinning medicines, or recent heavy exercise, which can also cause blood in the urine.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell whether the blood in your sample came from your period or from your urinary tract. A repeat test is needed to know.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- When should I repeat the test?
- How should I collect the sample?
- If blood is still present, what tests would follow?
- Could anything else, like exercise or medicines, explain this?
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 see clots, cannot pass urine, or have fever with back pain.
Book an appointment soon
- See a clinician within a few days if you notice visible blood in your urine outside your period.
Raise it at a routine appointment
- Arrange a repeat urine test after your period, as a routine step.
Sources
The evidence this explanation is built on.
- Urinary tract infection — adults MedlinePlus (NIH)
- Urinary tract infections MedlinePlus (NIH)
- Urinary tract infections (UTIs) 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.
Did this answer your question?
Whatever you choose is filed against this version of the answer, never against you, and it is never shown as a count.
“Explain more simply” asks you which part was hard to follow, so the author knows what to rewrite. “My question is different” opens a private follow-up with this answer attached.
Saving, following up and reporting are all private. Nothing you do on this page is visible to other readers or to the doctor who wrote it, unless you ask a question.