Regular screening is recommended for anyone who is sexually active, as many STIs can be present without causing noticeable symptoms.
Medical Dermatology
STI Screening in Singapore
Dr. Liew Hui Min
STI screening refers to laboratory testing used to detect infections that can be transmitted through sexual activity. Many sexually transmitted infections (STIs) do not cause immediate symptoms but can lead to serious complications if left untreated. Screening typically involves collecting urine, blood, or swab samples to test for infections such as chlamydia, gonorrhoea, syphilis, and HIV. The goal is to identify infections early for timely treatment, reduce the risk of long-term health consequences, and prevent transmission to partners.
Indications for STI Screening
STI screening may be advised in the following situations:
Routine testing for sexually active individuals
New sexual partnerships
Testing before entering a new relationship provides peace of mind and helps establish health awareness between partners.
Multiple sexual partners
Individuals with more than one sexual partner face increased exposure risk and benefit from more frequent screening to detect infections early.
Unprotected sexual contact
Following sexual contact without barrier protection, screening can identify any infections that may have been transmitted during the encounter.
Presence of symptoms
Unusual discharge, pain during urination, genital sores, or pelvic pain may indicate an infection requiring immediate testing and treatment.
If a partner tests positive for an STI
When a sexual partner has been diagnosed with an STI, screening helps determine if transmission has occurred and enables appropriate treatment.
Pregnancy planning or prenatal care
Testing before conception or during pregnancy helps prevent transmission to unborn children and ensures optimal maternal health.
Benefits of STI Screening
Timely STI screening offers several health and preventive advantages:
Early diagnosis and treatment: Reduces the risk of complications such as pelvic inflammatory disease, infertility, and chronic infection.
Reduced transmission to partners: Knowing your STI status allows you to take preventive measures.
Protection of fertility: Treating infections like chlamydia and gonorrhoea early prevents damage to reproductive organs.
Emotional reassurance: Regular testing offers peace of mind and supports mental well-being.
Lower long-term healthcare costs: Preventing serious outcomes through early detection reduces the need for advanced interventions.
STI Screening Methods and Techniques
STI screening involves different tests depending on the infection being evaluated:
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Urine test
Commonly used to detect chlamydia and gonorrhoea. It is non-invasive and does not require a physical exam.
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Blood test
Identifies infections such as HIV, syphilis, hepatitis B, and herpes through direct detection or antibody presence.
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Swab test
Samples are collected from the genitals, throat, or rectum depending on sexual practices and symptoms.
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Physical examination
May be performed to check for visible signs like sores, rashes, warts, or discharge.
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Culture test
Involves growing bacteria from a swab or fluid sample to determine the infection type and antibiotic sensitivity.
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PCR (polymerase chain reaction)
A molecular test that detects the genetic material of viruses or bacteria with high sensitivity.
Preparing for STI Screening
Proper preparation helps ensure accurate results and a smooth testing experience:
Medical history review
Prepare to discuss your sexual history, current symptoms, previous STI diagnoses, and any medications you are taking.
Timing considerations
Some infections have window periods during which they may not be detectable, so discuss the timing of your last potential exposure with your dermatologist.
Hygiene instructions
Avoid douching, using vaginal medications, or having sexual intercourse for 24 hours before testing.
First-catch urine preparation
For urine tests, you may be asked to avoid urinating for at least one hour before providing your sample to ensure adequate concentration of any potential pathogens.
Fasting requirements
Most STI tests do not require fasting, though some comprehensive panels that include liver function tests may require you to avoid eating for several hours beforehand.
Comfortable clothing
Wear easily removable clothing if a physical examination or genital swab collection is anticipated as part of your screening.
What to Expect During STI Screening
STI screening is a straightforward process that usually takes place during a single clinic visit:
Consultation: Your medical history will be reviewed to determine which tests are suitable based on your symptoms and risk factors.
Sample collection:
- You may be asked to provide a urine sample.
- A blood draw may be done to test for bloodborne infections.
- If needed, swabs from the genitals, throat, or rectum will be collected using sterile instruments. For females, a speculum vaginal examination will be performed for assessment as well as collecting samples for suspected infection and also for PAP smear.
Physical examination: May be performed if visible symptoms like sores or discharge are present.
After Your STI Screening
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Immediate aftercare
You can resume your normal activities immediately. Minor discomfort at the site of blood draws or swab collection typically resolves within 24–48 hours.
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Test results
Most results are available within 3–7 days. Some rapid tests, such as for HIV, may offer same-day results. We can email the results to you after getting your consent.
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Follow-up and Future Testing
If your results are positive, your dermatologist will explain the diagnosis, initiate treatment, provide partner notification guidance, and recommend appropriate screening intervals based on your risk profile and test results.
Potential Risks and Complications
STI screening is safe, with minimal side effects such as mild soreness from swabs or slight bruising at blood draw sites. Rarely, test results may be inaccurate due to false positives or false negatives. Some individuals may also experience anxiety while awaiting results. A qualified dermatologist ensures proper test selection, accurate interpretation, and appropriate follow-up, minimising errors and supporting timely, evidence-based treatment.
Frequently Asked Questions About STI Screening
How often should I have STI screening?
The frequency depends on your individual risk factors, but sexually active individuals typically benefit from annual screening. Those with multiple partners or other risk factors may need testing every 3-6 months.
Can I be tested during my period?
Yes, most STI tests can be performed during menstruation, though your dermatologist may prefer to schedule certain swab tests for after your period ends to ensure optimal sample quality.
Are my test results confidential?
STI screening results are strictly confidential and protected by medical privacy laws. Some positive results for certain infections may require reporting to public health authorities for monitoring purposes.
Can I eat before my STI screening appointment?
Most STI tests do not require fasting, so you can eat normally before your appointment. Your dermatologist will inform you if any specific preparation is needed for your particular tests.
What happens if I test positive for an STI?
If you test positive, your dermatologist will explain the results, discuss treatment options, and provide guidance on preventing transmission to partners. Most STIs are treatable with appropriate medication.
Dr Liew Hui Min
Dr. Liew Hui Min is an accredited consultant dermatologist from the Ministry of Health and the General Medical Council UK.
Her clinical interest includes:
- Paediatric Dermatology,
- Women’s Dermatology,
- General Adult Dermatology.
Having trained in major London Hospitals, Dr Liew returned to Singapore in 2014 as a Consultant at KK Women’s and Children’s Hospital (KKH) where she specialised in paediatric, women, obstetric and vulva dermatology. Currently, Dr Liew practices at The Skin Drs. clinic located at Gleneagles Hospital.
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