References UK clinical guidance from the NHS, the British HIV Association (BHIVA), and the British Association for Sexual Health and HIV (BASHH). Last updated: April 2026.
Rectal swab testing for chlamydia and gonorrhoea is essential for anyone who has receptive anal sex. Urine tests only detect urethral infections — they miss rectal infections entirely. Since rectal chlamydia and gonorrhoea are often silent, testing is the only way to know if you’re infected at this site.
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Why Rectal Testing Matters
| Issue | Detail |
|---|---|
| Urine misses rectal infection | Different sites need different samples |
| Often silent | Most rectal infections cause no symptoms |
| Ongoing transmission | Untreated infection spreads to partners |
| LGV risk | Severe chlamydia strains affect the rectum in MSM |
How to Self-Collect
- Insert swab about an inch into the rectum
- Rotate gently for a few seconds
- Place in provided container
- Post to lab
Who Needs Rectal Testing
- Anyone who has receptive anal sex
- MSM — every 3 months if at higher risk
- When symptoms like rectal pain, bleeding or discharge are present
Treatment
- Chlamydia — doxycycline 7 days
- Gonorrhoea — ceftriaxone injection
- LGV — doxycycline 21 days
Read more: Multi-site testing | Chlamydia and MSM | LGV guide
Frequently Asked Questions
Is self-collection accurate?
Yes — self-collected rectal swabs are as accurate as clinician-collected ones.
Is rectal testing uncomfortable?
Briefly — the swab takes seconds and most people find it much easier than expected.
Does standard STI testing include rectal?
Not always. Ask specifically if you have anal sex.
Related reading
- Comprehensive Test: Chlamydia, Gonorrhoea and Herpes
- Chlamydia and Gonorrhoea Lab Test
- Home Chlamydia and Gonorrhoea Tests: How They Work
- STI Throat Swab for Gonorrhoea and Chlamydia
- Multi-Site STI Testing: Genital, Rectal and Throat
Sources
- NHS — Sexual health conditions
- BASHH — UK clinical guidelines for STI management
- British HIV Association (BHIVA) — HIV treatment guidelines
- Terrence Higgins Trust — sexual health information
- UK Health Security Agency — STI surveillance data
Steve Page is a recognised expert on Sexually Transmitted Diseases (STDs) and STD treatments, having published numerous articles in peer-reviewed journals and presented his research at conferences around the world. He has an in-depth understanding of the latest medical research on STDs, and is an advocate for the development of new treatments and protocols to improve the health of those affected. In addition to his research, he has dedicated his career to understanding the causes and symptoms of STDs, as well as how to best treat those impacted.
