Gonorrhoea (Gonorrhea): Symptoms, Treatment, and Testing in Singapore
Gonorrhoea is one of the most common bacterial sexually transmitted infections, caused by Neisseria gonorrhoeae. It can infect the genital tract, rectum, throat, and eyes, and around half of women and 10 to 15% of men have no symptoms, so routine testing is important.
Medically reviewed by Dr. Qiao Yufei, MD
This guide covers how gonorrhoea spreads, symptoms in men and women, ceftriaxone treatment, antibiotic resistance, and how testing works at Mediway Medical Centre. Gonorrhoea is one of several conditions covered in our broader STDs in Singapore overview.
What is gonorrhoea?
Gonorrhoea is a sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae. The bacterium thrives in warm, moist mucous membranes and most commonly infects the genital tract, but can also affect the rectum, throat, and eyes (conjunctiva). The infection is sometimes nicknamed "the clap" in older lay literature.
Anyone who is sexually active can acquire gonorrhoea, regardless of gender or sexual orientation. According to the US Centers for Disease Control and Prevention (CDC), gonorrhoea is the second most commonly reported notifiable STI globally.
Yes. Gonorrhoea is curable with a single intramuscular dose of ceftriaxone. However, antibiotic resistance is a real and growing concern, so prompt treatment guided by current clinical guidelines (CDC, WHO) is essential. Untreated gonorrhoea does not clear on its own.
How gonorrhoea spreads
Gonorrhoea is transmitted through sexual contact with an infected partner. Both symptomatic and asymptomatic carriers can pass on the bacterium.
- Unprotected vaginal, anal, or oral sex
- Anal gonorrhoea (rectal) through receptive anal intercourse: often asymptomatic, more common in men who have sex with men (MSM)
- Pharyngeal gonorrhoea (throat) through oral sex: usually asymptomatic but acts as a transmission reservoir
- Mother-to-baby transmission during childbirth, which can cause ophthalmia neonatorum (severe newborn eye infection)
- Eye infection can also occur if infected fluids contact the eye through hand contact
Who is at higher risk?
- People under 25 who are sexually active (rates are highest in this age group worldwide)
- Men who have sex with men (MSM), particularly for rectal and pharyngeal infection
- People with multiple sexual partners or inconsistent condom use
- Anyone with a previous STI diagnosis
Signs and symptoms of gonorrhoea
Gonorrhoea symptoms can appear within 2 to 14 days of exposure, but most people have no symptoms at all in the early stages. Routine STI screening is the only reliable way to detect asymptomatic infection.
In women
- Increased or unusual vaginal discharge
- Painful or burning urination
- Pelvic or lower abdominal pain
- Bleeding between periods or after sex
- Pain during intercourse
In men
- White, yellow, or green discharge from the penis
- Painful urination
- Swelling or pain in one testicle
- Painful, swollen, or red urethra
Rectal gonorrhoea: often asymptomatic; can cause anal discharge, itching, soreness, bleeding, or painful bowel movements.
Pharyngeal gonorrhoea: usually asymptomatic; occasionally a sore throat or swollen lymph nodes.
Eye (gonococcal conjunctivitis): redness, discharge, eyelid swelling: a medical urgency.
How gonorrhoea is diagnosed
Gonorrhoea is diagnosed quickly and painlessly. At Mediway Medical Centre, the right test is selected based on your sexual history and the sites at risk:
- Urine test: a first-catch urine sample is sent for nucleic acid amplification testing (NAAT). Used for genital infection.
- Site-specific swabs: rectal and pharyngeal swabs are recommended for anyone with anal or oral exposure, as these sites are often missed by urine testing alone.
- Co-testing for chlamydia is standard, since the two infections frequently occur together.
Most lab results return within a few working days. Treatment can usually start at the same visit if clinical suspicion is high.
Gonorrhoea treatment
Gonorrhoea is treatable with antibiotics. Current CDC and WHO recommendations have moved to a single intramuscular injection of ceftriaxone (500 mg) as monotherapy, with co-treatment for chlamydia (oral doxycycline 100 mg twice daily for 7 days) added if chlamydia has not been excluded.
- Ceftriaxone IM: single 500 mg dose (current first-line)
- Doxycycline orally for 7 days: added if chlamydia co-infection is possible
- Test of cure: a follow-up test about 2 weeks after treatment, especially for pharyngeal infection where ceftriaxone may be less reliable
- Repeat testing at 3 months: recommended to detect reinfection
Why antibiotic resistance matters
Neisseria gonorrhoeae has progressively developed resistance to multiple antibiotic classes (penicillin, tetracycline, fluoroquinolones, and more recently macrolides like azithromycin). Ceftriaxone is currently the only single-dose treatment that remains reliably effective. Per the WHO, gonococcal antimicrobial resistance is one of the top global public health threats. This is why current guidelines emphasise prompt testing, full treatment doses, and partner notification.
After treatment
- Avoid sexual activity for at least 7 days after treatment
- Sexual partners from the past 60 days should be tested and treated
- Repeat testing about 3 months after treatment is recommended to detect reinfection
How to prevent gonorrhoea
Practise safe sex
- Use condoms consistently and correctly during vaginal, anal, and oral sex
- Use a fresh condom or barrier on shared sex toys between partners
Get screened regularly
Routine STI screening is one of the simplest ways to protect yourself, especially if you are under 25, MSM, or have new or multiple partners. Testing is quick, confidential, and most results return within a few days.
Communicate with your partner
Open conversations about sexual health, recent partners, and STI status help both partners stay safe. If either of you tests positive, the other should be tested and treated before resuming unprotected sex.
What happens if gonorrhoea is left untreated?
Untreated gonorrhoea does not clear on its own and can cause serious health problems:
In women
- Pelvic inflammatory disease (PID): can damage fallopian tubes, causing infertility, ectopic pregnancy, and chronic pelvic pain
- Disseminated gonococcal infection: spread to joints, skin, and bloodstream
In men
- Epididymitis: testicular inflammation; in rare cases can cause infertility
- Disseminated gonococcal infection: spread to joints and bloodstream
Untreated gonorrhoea increases the risk of acquiring or transmitting HIV and other STIs. Pregnant women with untreated gonorrhoea can pass the bacterium to their newborn during childbirth, causing ophthalmia neonatorum, a serious eye infection that can cause blindness if not treated promptly.
Frequently asked questions
01 What is gonorrhoea?
Gonorrhoea is a sexually transmitted infection caused by the bacterium Neisseria gonorrhoeae. It can affect the genitals, rectum, and throat. Many people with gonorrhoea have no symptoms, especially at the throat or rectum, so routine STI screening is recommended for sexually active adults. Untreated gonorrhoea may cause serious complications, and the bacterium has been developing resistance to multiple antibiotics, making timely diagnosis and appropriate treatment increasingly important.
02 What are the symptoms of gonorrhoea?
Many people with gonorrhoea have no symptoms. When symptoms occur, women may notice unusual vaginal discharge, painful urination, bleeding between periods, or lower abdominal pain. Men may experience white, yellow, or green penile discharge, painful urination, or testicular pain or swelling. Anyone can have rectal symptoms (discharge, pain, bleeding) if rectal infection is present, while throat infection is often asymptomatic. Symptom absence is common, which is why screening matters.
03 How soon can gonorrhoea symptoms appear after exposure?
Symptoms, when they occur, typically appear within 2 to 14 days after exposure. However, many people have no symptoms at all. Because of the incubation period and frequent absence of symptoms, regular STI testing is recommended after potential exposure or with a new sexual partner, even if you feel well.
04 How do you get gonorrhoea?
Gonorrhoea is transmitted through unprotected vaginal, anal, or oral sex with an infected partner, which is why throat (pharyngeal) and rectal infections are also common. Mother-to-baby transmission can occur during childbirth, which may cause eye infection (neonatal conjunctivitis) in the newborn. Gonorrhoea is not spread through casual contact such as hugging, sharing utensils, or using the same toilet.
05 Is gonorrhoea curable?
Yes. Gonorrhoea is curable with appropriate antibiotic treatment prescribed by a doctor. Untreated gonorrhoea does not clear on its own and may cause serious complications. Having had gonorrhoea does not protect you from getting it again. Reinfection is possible if you are exposed through an untreated partner or new exposure. Sexual partners should also be tested and treated to prevent reinfection.
06 How is gonorrhoea treated?
Gonorrhoea is treated with prescription antibiotics. Your doctor will choose the appropriate antibiotic and dosing based on your situation, current clinical guidance, possible co-infection such as chlamydia, and any allergies. Treatment is often given as an intramuscular injection, though the exact regimen varies. Avoid sexual activity until treatment is completed as advised and recent partners have been treated. Your doctor may also recommend testing for other STIs.
07 Why is antibiotic resistance a concern with gonorrhoea?
Neisseria gonorrhoeae has progressively developed resistance to multiple antibiotic classes including penicillin, tetracycline, fluoroquinolones, and more recently macrolides. This is why current treatment relies on antibiotics like ceftriaxone and is closely guided by current clinical and public health recommendations. Completing the full prescribed treatment course and ensuring partners are also treated are important to help prevent further resistance from developing.
08 What are the complications of untreated gonorrhoea?
Untreated gonorrhoea may cause serious complications. In women, it may lead to pelvic inflammatory disease (PID), damage to the fallopian tubes, infertility, ectopic pregnancy, and chronic pelvic pain. In men, it may cause epididymitis (testicular inflammation, occasionally leading to infertility). Both sexes may develop disseminated gonococcal infection, which can affect joints, skin, and the heart. Untreated infection also increases the risk of contracting HIV.
09 How can I prevent gonorrhoea?
Gonorrhoea risk can be reduced by using condoms consistently during vaginal, anal, or oral sex, having regular STI screenings (especially with new or multiple partners), maintaining a mutually monogamous relationship with a tested uninfected partner, and ensuring sex toys are cleaned or covered with a fresh condom between partners. Open conversations with partners about STI status also support prevention.
10 Where can I get tested for gonorrhoea in Singapore?
You can get tested at Mediway through our STD testing service. Testing may involve a urine sample or site-specific swab (cervix, urethra, throat, or rectum), depending on symptoms and possible exposure. The doctor will recommend the appropriate tests and discuss treatment if needed. Learn more on our STD testing in Singapore page, or speak to our team to arrange a confidential consultation.
Related conditions and next steps
References: CDC: Gonorrhoea fact sheet · WHO: STIs fact sheet · HealthHub Singapore
This page is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Consult a qualified healthcare professional for diagnosis and treatment of suspected gonorrhoea.