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.
Yes, condoms are one of the most effective tools for preventing STIs. When used correctly every time, they dramatically reduce the risk of HIV, chlamydia, gonorrhoea, syphilis and many other infections. They’re not perfect — some STIs like herpes and HPV can still spread from uncovered skin — but they remain essential for broad-spectrum protection.
Here’s what to know.
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What Condoms Protect Against
| STI | Protection Level |
|---|---|
| HIV | Very high (80-95% with correct use) |
| Chlamydia | High |
| Gonorrhoea | High |
| Syphilis | High if chancre is covered |
| Trichomoniasis | High |
| Hepatitis B | High |
| Herpes | Reduced but not eliminated — can spread from uncovered skin |
| HPV | Reduced but not eliminated |
| Pubic lice, scabies | Little effect — spread through skin contact |
How to Use Condoms Correctly
- Check the expiry date
- Open the packet carefully
- Pinch the tip to remove air
- Roll down the erect penis
- Use water or silicone-based lubricant
- Hold the base when withdrawing
- Dispose of in a bin, not the toilet
Common Mistakes
- Not using from start to finish
- Using oil-based lube with latex (causes breakage)
- Putting on inside out then flipping
- Reusing condoms
- Using two condoms at once (friction breakage)
- Using expired or damaged condoms
- Storing in hot places like wallets or cars
Types of Condom
- External (male) — rolled onto the penis
- Internal (female) — inserted into the vagina or anus
- Latex — standard, effective, widely available
- Polyurethane / polyisoprene — good for latex allergy
- Nitrile (internal condoms) — compatible with oil-based lube
When Condoms Don’t Fully Protect
- Herpes and HPV can spread from skin not covered by the condom
- Pubic lice and scabies spread through skin contact regardless
- If the condom breaks or slips off
- If used inconsistently
Where to Get Free Condoms
- Sexual health clinics
- GP surgery (in some areas)
- Young people’s services
- Student unions
- C-Card schemes for young people
Combining With Other Methods
- Condoms + PrEP — best protection for HIV plus other STIs
- Condoms + regular testing — catches any breakthrough infections early
- Condoms + HPV vaccine — strong combined protection
Read more: Condoms and HIV | Condom and lube use | Ways to prevent STIs
Frequently Asked Questions
Do condoms prevent all STIs?
Most, but not completely. Herpes, HPV and skin-to-skin infections can still spread from uncovered areas.
Are condoms 100% effective when used correctly?
Very high but not 100%. Consistent use provides the best protection.
Can I use condoms for oral sex?
Yes. Flavoured condoms or dental dams are available.
Related reading
- How to Prevent HPV
- What Is a Female (Internal) Condom?
- Blood Test for Syphilis, Hepatitis B and Hepatitis C
- Can Condoms Protect Against HIV?
- Can You Get an STI From Being Fingered?
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.
