An STD in women is easy to miss. Many sexually transmitted infections cause no symptoms at all in women, and when they do, the signs often look like thrush, a urinary tract infection or a normal change in discharge. At HOP Medical Centre, we regularly see women who were treated for “just a UTI” more than once before an STD test found the real cause.

✍ Written by: HOP Medical Centre Health Content Team 📅 Published: October 2026 | 🔄 Last Reviewed: October 2026

This guide covers the most common infections, the signs to watch for, why women face particular risks, how testing works, and how to protect yourself.

Why an STD in Women Is Often Missed

Women’s anatomy makes some infections harder to notice. The cervix and vagina can carry an infection without pain, and mild discharge or discomfort is easy to put down to hormones, periods or a minor irritation.

Chlamydia is a good example. It’s the most commonly reported STI locally, according to the Communicable Diseases Agency (https://www.cda.gov.sg/professionals/diseases/chlamydia/), and it can stay silent for months in women. During that time it can spread to the womb and fallopian tubes. That’s why testing, not waiting for symptoms, is the most reliable way to know your status.

Common Types of STD in Women

Infection	Possible signs in women	Main risk if untreated
Chlamydia	Often none; sometimes discharge, bleeding after sex, pelvic pain	Pelvic inflammatory disease, fertility problems
Gonorrhoea	Discharge, burning when passing urine, bleeding between periods	Pelvic inflammatory disease, fertility problems
Mycoplasma genitalium	Often none; sometimes discharge or pain	Cervicitis and pelvic inflammation
HPV	Usually none; some types cause genital warts	Persistent high-risk types can lead to cervical cancer
Genital herpes	Painful blisters or sores that come and go	Recurring outbreaks; risk to a baby at birth
Syphilis	Painless sore, later a rash; may then go quiet	Damage to heart, brain and nerves; can pass to a baby
Trichomoniasis	Frothy, strong-smelling discharge, itching	Discomfort; easier spread of other infections
HIV, hepatitis B and C	Often none for years; sometimes flu-like illness early on	Long-term damage to the immune system or liver

Signs and Symptoms to Watch For

When an STD in women does cause symptoms, the most common ones are:

• Discharge that changes in colour, smell or amount
• Burning or pain when passing urine
• Bleeding after sex or between periods
• Pain during sex
• Pain in the lower abdomen or pelvis
• Itching, sores, blisters or small bumps around the genitals
• Swollen glands in the groin

Several of these overlap with thrush and UTIs. If symptoms keep coming back after treatment, or started after a new partner, ask for an STD test rather than another round of the same treatment. Our STD symptoms guide (https://hop.sg/std-symptoms-singapore/) explains which signs link to which infections.

Why Women Face Particular Risks

Untreated chlamydia and gonorrhoea can travel upwards and cause pelvic inflammatory disease (PID). PID can lead to long-term pelvic pain, blocked fallopian tubes, ectopic pregnancy and difficulty getting pregnant, often without a woman ever knowing she had an infection.

High-risk types of HPV are the main cause of cervical cancer. Most HPV infections clear on their own, but some persist and slowly change cervical cells. Regular cervical screening finds these changes early, years before cancer develops.

Pregnancy adds another layer. Syphilis, HIV, hepatitis B and herpes can pass to a baby during pregnancy or birth. Testing before or early in pregnancy allows treatment that protects both mother and baby.

How Testing Works at HOP Medical Centre

Testing is quick and private. Depending on the package, you give a urine sample or vaginal swab, a blood sample, or both. Every appointment takes place in a private consultation room, and walk-ins are welcome at both our Orchard and Tampines clinics, with no referral needed.

• Package A ($106.82): HIV, syphilis, hepatitis B and C (blood test)
• Package B ($150.42): Package A plus herpes
• Package C ($194.02, or $226.72 express): chlamydia and gonorrhoea (urine or vaginal swab), express results from 30 minutes, anonymous option available
• Package D ($270.32, or $303.02 express): Package C plus Mycoplasma genitalium, express results from 30 minutes
• Package F ($521.02): a comprehensive 12-infection panel

All prices include GST. Standard results take 2 to 5 working days. You can compare packages in our STD test cost guide (https://hop.sg/std-test-cost-singapore/). For HPV and cervical changes, HOP also offers cervical cancer screening: a ThinPrep Pap smear, HPV DNA testing, or both together.

Treatment for an STD in Women

Bacterial infections, including chlamydia, gonorrhoea and syphilis, are curable with antibiotics. The parasite that causes trichomoniasis is also treated with medication. Viral infections such as herpes, HIV and hepatitis B can’t always be cured, but treatment controls them well and lowers the chance of passing them on.

If a result comes back positive, the doctor explains what it means, discusses treatment, and advises on partner testing and follow-up. Partners need treatment too, or the infection can pass back and forth.

How to Lower Your Risk

• Use condoms consistently and correctly
• Test with a new partner before stopping condoms
• Get the HPV vaccine. HOP offers Cervarix and Gardasil 9, and our HPV vaccination guide (https://hop.sg/hpv-vaccination-singapore-hopsg-singapore/) explains who benefits.
• Keep up with cervical screening from age 25
• Ask about PrEP if you’re at higher risk of HIV; HOP offers it to eligible patients
• Test regularly, even without symptoms

Frequently Asked Questions About STD in Women

1. Can a woman have an STD without symptoms?
Yes. Chlamydia, gonorrhoea, HPV, syphilis and HIV can all be present without symptoms in women, sometimes for months or years. Testing is the only reliable way to know.

2. Can an STD be mistaken for a UTI or thrush?
Often. Burning, discharge and itching can come from either. If symptoms return after treatment, an STD test is worthwhile.

3. Can an STD affect fertility?
Yes. Untreated chlamydia and gonorrhoea can cause pelvic inflammatory disease, which can damage the fallopian tubes and make it harder to get pregnant.

4. Is HPV an STD?
Yes. It’s the most common sexually transmitted infection. Most infections clear on their own, but persistent high-risk types can cause cervical cancer, which is why cervical screening matters.

5. Which test should I take?
For most sexually active women, chlamydia and gonorrhoea testing (Package C) is a sensible start. Adding blood tests for HIV, syphilis and hepatitis, or choosing the comprehensive panel, gives broader coverage. The doctor can advise.

More Questions About Testing for Women

6. How is an STD test done for women?
Depending on the package, it uses a urine sample or vaginal swab, a blood sample, or both. It takes place in a private consultation room.

7. How fast are results at HOP Medical Centre?
Packages C and D offer express results from 30 minutes. Other results take 2 to 5 working days.

8. Is STD testing included in women’s health screening?
No, it’s a separate service, but both can be booked in the same visit at HOP Medical Centre.

9. Can I walk in for testing?
Yes. Walk-in STD testing is available at Orchard (Palais Renaissance) and Tampines (CPF Building) with no referral needed.

Knowing Is Better Than Guessing

An STD in women rarely announces itself clearly, and the cost of missing one can be high, from fertility problems to cervical changes. Testing is quick, discreet and straightforward, and most infections are easy to treat once they’re found.