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Urine Test Explained (Singapore)

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Urine test
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Written & reviewed by the BestDoctors.sg editorial team · Last updated 25 Aug 2026 · General information, not medical advice

A urine test (urinalysis) examines a sample of your urine for signs of infection, kidney or bladder problems, diabetes, dehydration and other conditions. It is one of the commonest, quickest and least invasive tests, done routinely at GP clinics and polyclinics for symptoms, health screening, pregnancy care, and diabetes or kidney monitoring. A single strip result is a clue, not a verdict — a trace of something on a dipstick is often not significant, and results are read together with your symptoms and other tests. One symptom, though, always deserves a doctor: visible blood in the urine should always be checked.

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In a medical emergency, or for severe or sudden symptoms such as breathing difficulty, chest pain, fainting or stroke signs, call 995 immediately.

Get visible blood in the urine (pink, red or cola-coloured) checked even if it happens once and is painless. See a doctor promptly for painful urination with fever or back pain, and for urinary symptoms in pregnancy, in men, or in the frail elderly. Call 995 if you cannot pass urine, have severe pain, or feel very unwell.

What it is and why it is done

Urinalysis is usually a first, low-cost step that helps a doctor decide whether more tests are needed. It is done for symptoms such as burning when passing urine, as part of a health screen, in pregnancy care, to monitor diabetes and the kidneys, and sometimes before a procedure. Because it is quick and non-invasive, it is one of the most frequently ordered tests in primary care.

The types of urine test

The dipstick urinalysis is a plastic strip with coloured pads that change colour in seconds, screening for blood, protein, glucose, leukocytes and nitrites (which together suggest a urinary tract infection), ketones and pH. Urine microscopy views the sample under a microscope for red and white blood cells, casts and crystals, and bacteria. Urine culture grows the sample in the lab over a day or two to identify the specific bacterium and which antibiotics will work — this is what confirms a urinary tract infection. A urine albumin or protein test (ACR) is a sensitive check for early kidney damage, especially in diabetes, and a pregnancy test detects the hormone hCG.

How to give a good sample

Most tests use a clean-catch midstream sample: wash your hands, clean the area, pass a little urine into the toilet first, then catch the middle part in the sterile container and finish in the toilet — the midstream step reduces contamination from the skin. A first-morning sample is more concentrated and preferred for some tests, so follow whatever the clinic asks, and deliver the sample promptly or refrigerate it if there is a delay. For women, menstrual blood can contaminate the sample and show up as “blood,” so tell staff if you are on your period.

When colour is harmless

Urine colour changes are often harmless. Beetroot, blackberries, some food dyes, B-vitamins and certain medicines can turn urine pink, red, orange or bright yellow, and this is usually not actual blood. That said, do not self-diagnose genuinely red or bloody-looking urine as “just beetroot” — because red urine can occasionally be real blood, it is safest to have it checked (see red flags).

What results mean and their limits

A trace on a dipstick is often not significant, because strips are deliberately sensitive and small amounts of blood, protein or leukocytes can appear in healthy people or from contamination, frequently needing a repeat or confirmation. Results are read together with your symptoms and other tests, never in isolation: a positive dipstick without symptoms may mean nothing, while symptoms with a negative dipstick can still be a real problem. Bacteria in the urine without symptoms usually should not be treated with antibiotics in most non-pregnant adults, to avoid driving resistance — pregnancy being an important exception — and a culture is more definitive than a dipstick for infection but takes a day or two.

Red flags

Some situations need a doctor rather than self-treatment. Visible blood in the urine should always be checked, even if it is painless and happens once, because although most causes are benign it can occasionally be the first sign of something that needs investigation — our blood in the urine guide covers this. Painful urination with fever, chills or back or flank pain may mean the infection has reached the kidney and needs prompt care, and urinary symptoms in pregnancy, in men, or in the frail elderly warrant earlier review. Being unable to pass urine, severe pain, new confusion in an older person, or feeling very unwell need urgent care, with 995 if severe.

Getting tested in Singapore

Urine tests are done at GP clinics and polyclinics, usually needing no fasting, and the results are explained by the ordering doctor. HealthHub offers trusted general information. The two things worth remembering are that a dipstick “trace” is usually minor and interpreted in context, and that visible blood in the urine should never be brushed off as diet — get it checked. It also helps to give a good clean-catch sample and to mention anything that could affect the result, such as being on your period, recent foods or medicines, so the doctor can read it accurately. Used well, a urine test is a quick, painless and genuinely informative first step that often either reassures you or points clearly to the next thing worth doing.

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Sources

General information only. This guide explains what a test is and what to expect — it is not a diagnosis. A test result must be interpreted by a doctor in the context of your history, symptoms and other results, so do not diagnose yourself from a single number. Reference (“normal”) ranges vary between laboratories and between people, an out-of-range result is often not serious, and a normal result does not always exclude a problem. Discuss your results with the doctor who ordered them. Call 995 for a medical emergency such as severe chest pain, sudden severe breathlessness, fainting or collapse.

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Frequently asked questions

Do I need to fast before a urine test?

Usually no. Most urine tests need no fasting — just follow any specific instructions, such as a first-morning or clean-catch sample. A few specialised tests have preparation, which the clinic will tell you.

My urine looks pink after eating beetroot — is that blood?

Often it is harmless food colouring from beetroot, berries or some dyes and medicines. But because red urine can occasionally be real blood, it is safest to get genuinely red or bloody-looking urine checked rather than assume it is diet.

The dipstick showed a “trace” of protein or blood — should I worry?

Not necessarily. Strips are very sensitive and small traces are common and often insignificant. Your doctor interprets it alongside your symptoms and may simply repeat the test.

Can I do a urine test during my period?

It is better to wait or tell the clinic, because menstrual blood can contaminate the sample and confuse the result. Staff can advise on timing.

My urine test showed bacteria but I feel fine — do I need antibiotics?

Often not. Bacteria without symptoms usually do not need treatment in most adults, to avoid unnecessary antibiotics — a key exception is pregnancy. Your doctor will decide based on your situation.