Condoms, when used correctly, are highly effective at preventing both STIs and unintended pregnancy. Anal sex raises specific questions that vaginal sex does not: it carries a higher transmission risk for HIV and other STIs, the anatomy requires a different approach to preparation, and lube is not optional. This guide covers everything - from preparation and condom choice to HIV risk, PrEP, and aftercare.
Medically reviewed by Dr Deborah Lee BM MRCGP FFSRH DRCOG Dip GUM
Table of Contents
- What is Anal Sex?
- How is Anal Sex Different from Vaginal Sex?
- How to Have Comfortable Anal Sex
- Should I Always Use a Condom During Anal Sex?
- Lube and Anal Sex
- Other Tips for Safer Anal Sex
- Best Condoms for Anal Sex
- FAQ
What is Anal Sex?
Anal sex refers to inserting a penis, fingers, or objects into someone's rectum. It typically involves anal stimulation and penetration to heighten sexual pleasure and orgasm, and it is common among adults of all sexualities, whether alone or with a partner.
How is Anal Sex Different from Vaginal Sex?
Anal sex carries a higher risk of STI transmission than vaginal sex. The rectal lining is a single layer of cells - thinner and less elastic than vaginal tissue - and it is designed for waste passage, not penetration. This means it is more prone to micro-tears during sex, which create direct entry points for viruses and bacteria including HIV, gonorrhoea, chlamydia, herpes, and syphilis.
Unlike the vagina, the anus produces no natural lubrication. This makes added lubricant essential rather than optional. Without it, friction damages the rectal lining and significantly increases the risk of STI transmission. Anal tissue also requires more care and gentleness than vaginal tissue - preparation, communication with your partner, and going slowly matter more here than in most other forms of sex.
How to Have Comfortable Anal Sex?
If you are engaging in anal intercourse, proper preparation is critical. Here are the key considerations before, during, and after:
- Relax - Make sure you are relaxed and comfortable before beginning anal play. Foreplay, massage, and communication with your partner all help. Use different stimulation techniques to relax the muscles. If at any point it becomes painful, stop - pain is a signal that something needs to change, whether that is more lube, a slower pace, or a break.
- Always use lube - This is non-negotiable for anal sex. The anus produces no natural lubrication, making lubricant essential to reduce friction, prevent tissue damage, and make the experience comfortable. Water-based and silicone-based lubricants are both compatible with latex condoms. Do not use oil-based lubricants with latex or polyisoprene condoms - oil degrades the condom material and significantly increases the risk of tearing. (Source: BASHH guidelines on condom use)
- Go slowly - There is no need to rush. Take things slowly, and take breaks if needed to ensure everything remains comfortable for both partners. You can adjust pace as you both feel comfortable.
- Cleanliness matters - Cleanliness is essential with all sexual activity, and particularly with anal sex.
A Note on Anal Douching
Many people clean the rectum before anal sex. However, the evidence on this practice warrants serious caution.
In a 2014 American study, 88% of men reported having an enema before receptive anal sex, and 28% douched afterwards. However, water can damage the rectal mucosa - the cells lining the rectum - and douching with water can actually increase STI transmission risk by compromising this protective barrier.
A 2019 study found that rectal douching almost trebled the risk of HIV acquisition and also increased the risk of syphilis, hepatitis B and C, chlamydia, gonorrhoea, and human papillomavirus (HPV).
The safest approach is simply to shower the external anal area with warm water and soap. Do not introduce anything into the anal canal for cleaning purposes. After anal sex, wash your hands thoroughly with warm water and soap to avoid infection from rectal organisms including shigella and E. coli. (Source: Medical News Today)
Using a condom provides an additional barrier against bacteria and STIs throughout.
Should I Always Use a Condom During Anal Sex?
Yes. Condoms are the most effective barrier method for reducing STI transmission during anal sex. Anal sex carries a higher risk of HIV and STI transmission than vaginal sex, and using a condom correctly every time is the most important protective measure available.
Anal sex without a condom significantly increases the risk of acquiring HIV, gonorrhoea, chlamydia, syphilis, herpes, and HPV. The receptive partner (the person being penetrated) carries a higher per-act transmission risk than the insertive partner for most STIs including HIV, but both partners carry meaningful risk.
You might think you cannot get pregnant from anal sex, but sperm can travel from the anal area to the vagina during the same sexual encounter. To be certain, use a condom.
HIV Risk and Anal Sex
Anal sex remains the most common route of new HIV transmission in the UK. In a 2017 study, just under 40% of 2,189 HIV-positive men reported having anal sex without a condom in the previous three months.
There are important nuances to understand:
- Having anal sex with a partner who is HIV positive and on effective antiretroviral treatment (ART) with an undetectable viral load is not likely to result in HIV transmission. This principle - Undetectable = Untransmittable (U=U) - is supported by substantial research and endorsed by the NHS and Terence Higgins Trust.
- Having anal sex with a partner whose HIV status is unknown remains a significant risk for HIV acquisition. (Source: NHS on HIV and AIDS)
Gay and bisexual men who are not in monogamous relationships and do not regularly use condoms are recommended to have an HIV test every three months. Otherwise, they should have an HIV test at least once a year.
PEP and PrEP
PEP (Post-Exposure Prophylaxis) is a course of antiviral medication that can prevent HIV infection after a potential exposure. The Terence Higgins Trust recommends condoms are always used for anal sex, but if a condom fails during anal sex with a partner of unknown or positive HIV status, PEP can be accessed at NHS sexual health clinics and some A&E departments. It must be started within 72 hours of the exposure - the sooner the better. (Source: Terence Higgins Trust)
PrEP (Pre-Exposure Prophylaxis) is a daily medication taken by HIV-negative people to prevent HIV infection before any potential exposure. When taken correctly, clinical studies show PrEP reduces the risk of HIV transmission from anal sex by approximately 99%. PrEP has been available free on the NHS in England, Scotland, Wales, and Northern Ireland since 2020, and is prescribed through sexual health clinics.
PrEP does not protect against other STIs. Condom use remains recommended even for people taking PrEP.
Which Types of Condoms are Best for Anal Sex?
When choosing condoms for anal sex, the two most important factors are thickness and fit.
Thicker condoms are more resistant to tearing under the higher friction conditions of anal sex. Look for condoms described as "extra safe", "extra strong", or "extra thick". The size must also be correct - a condom that is too tight is more likely to break; one that is too loose may slip. Read more about choosing the right size condom.
Do not use two condoms at once. Layering condoms increases friction between the two latex surfaces and makes breakage more likely, not less.
Internal condoms (sometimes called female condoms) can also be used for anal sex. They are inserted into the anal canal by the receptive partner before penetration and create an internal barrier. Internal condoms are made from nitrile, which means they are compatible with all lubricant types including oil-based, and are a good option for people with a latex allergy. Some people find them useful because the receptive partner can insert them independently in advance.
Lube and Anal Sex
Lube is not optional for anal sex - it is a requirement. The anal canal produces no natural lubrication, which means that without added lubricant, friction from penetration damages the rectal lining and significantly increases STI transmission risk through micro-tears.
Water-based lubricant is the most versatile choice. It is compatible with all condom materials (latex, polyisoprene, polyurethane) and all sex toy materials, easy to clean up, and generally the gentlest option for sensitive skin. It may need reapplying during longer sessions as it can dry out under friction.
Silicone-based lubricant lasts longer without reapplying - making it particularly well suited to anal sex, where sustained lubrication throughout is important. It is compatible with latex and polyisoprene condoms. Do not use silicone-based lube with silicone sex toys, as it degrades the surface material over time.
Oil-based products - including coconut oil, Vaseline, baby oil, or body lotion - must not be used with latex or polyisoprene condoms. Oil degrades condom material rapidly and significantly increases the risk of tearing.
Apply lube generously before penetration and reapply during sex if needed. If friction increases or the lube appears to have dried out, stop and reapply rather than continuing.
For a full comparison of lube types, see our water-based vs silicone lube guide. Browse the full lubricant range at Condoms.uk.
Other Tips for Safer Anal Sex
Another method to explore your sexuality and experience new levels of pleasure is anal sex. However, there are several things worth knowing for a safe and comfortable experience:
- Never reuse a condom. Use a fresh condom for each act of penetration.
- Change condoms between anal and vaginal sex. Moving from anal to vaginal sex with the same condom transfers rectal bacteria to the vagina, which can cause infection. Always use a new condom when switching.
- Communicate throughout. Anal sex requires ongoing communication - check in with your partner about pace, pressure, and comfort at every stage. Either partner should feel comfortable pausing or stopping at any point.
- Keep spare condoms available. If a condom tears or slips, replace it immediately. This is more likely during anal sex than vaginal sex due to higher friction.
- Consider regular STI testing. Sexually active adults having anal sex should test regularly. Gay and bisexual men without a monogamous partner are advised to test every three months. NHS sexual health clinics provide free, confidential testing.
- Rimming (anilingus) - oral contact with the anus - also carries transmission risk for hepatitis A and B, shigella, herpes, gonorrhoea, syphilis, and HPV. Using a dental dam or a cut-open condom as a barrier during rimming significantly reduces this risk.
You and your partner can safely explore anal sex with adequate time, plenty of lube, and open communication.
Best Condoms for Anal Sex
To ensure the best experience, here are our top picks for condoms suited to anal sex:
Durex Extra Safe Condoms - thicker than standard Durex condoms, providing additional resistance to tearing under friction. 56mm nominal width, extra-lubricated, odour-free, and made from natural rubber latex. UKCA and CE approved.
Adore Extra Sure Condoms - extra-thick condoms with a 54mm nominal width, suitable for regular-fit users. Made from natural rubber latex, pre-lubricated with non-spermicidal lubricant. Adore recommends adding a water-based lubricant for anal sex regardless of the existing pre-lubrication. Not suitable for people with a latex allergy.
Pasante Extra Condoms - slightly thicker than standard Pasante condoms, 52mm nominal width, 190mm in length. Vegan-friendly and free from animal-derived ingredients. Suitable for both anal and vaginal sex.
Mates Super Safe Condoms - smooth, particularly thick condoms with a 52mm nominal width and teat-ended straight wall design. Pre-lubricated with non-spermicidal lubricant; we recommend adding water-based or silicone-based lube for anal use. Made from natural latex.
For help finding the right size, use our condom size guide. For advice on lube compatibility, see our water-based vs silicone lube guide.
FAQ
Is anal sex safe?
Anal sex is safe when the right precautions are in place: using a condom, using plenty of water-based or silicone-based lubricant, communicating openly with your partner, and going slowly. Without a condom, anal sex carries a higher risk of STI transmission - including HIV - than vaginal sex, due to the thinner and more fragile rectal lining. With a correctly fitted condom and adequate lubrication, the risk is substantially reduced.
Do you need a condom for anal sex?
Yes. Anal sex carries a higher risk of STI transmission than vaginal sex because the rectal lining is thinner and more prone to micro-tears than vaginal tissue. Those micro-tears create direct entry points for bacteria and viruses. A condom provides the most effective barrier protection. Even people taking PrEP to prevent HIV are recommended to use condoms to protect against other STIs including gonorrhoea, syphilis, and chlamydia.
What is the best lube for anal sex?
Both water-based and silicone-based lubricants work well for anal sex with latex condoms. Silicone-based lube lasts longer without reapplying, which is useful during anal sex where sustained lubrication is important. Water-based lube is compatible with all condom and toy materials and is the more versatile option. Never use oil-based products (coconut oil, Vaseline, baby oil) with latex or polyisoprene condoms - oil degrades the material and significantly increases the risk of condom failure.
Can you get pregnant from anal sex?
Direct fertilisation from anal sex alone is not possible. However, if semen comes into contact with the vulva or vaginal opening after anal sex - which can happen during the same sexual encounter - pregnancy is theoretically possible. Using a condom, and changing it before switching from anal to vaginal sex, eliminates this risk.
What is the HIV risk from anal sex?
Anal sex is the highest-risk sexual activity for HIV transmission. The receptive partner has a substantially higher per-act transmission risk than the insertive partner. Key risk-reduction measures include: consistent condom use, PrEP (which reduces risk by approximately 99%), and knowing your partner's HIV status and viral load. If a condom fails during anal sex with a partner of unknown or positive HIV status, PEP (Post-Exposure Prophylaxis) is available from sexual health clinics and some A&E departments and must be started within 72 hours.
What is PrEP and who should consider it?
PrEP (Pre-Exposure Prophylaxis) is a daily medication taken by HIV-negative people to prevent HIV infection. When taken correctly, it reduces the risk of HIV from anal sex by approximately 99%. PrEP is available free on the NHS through sexual health clinics in England, Scotland, Wales, and Northern Ireland. It is recommended for people at higher risk of HIV, including gay and bisexual men who have anal sex without condoms or have multiple partners. PrEP does not protect against other STIs - condom use remains advised alongside it.
Can you use a normal condom for anal sex?
Yes. Standard condoms provide STI protection during anal sex. However, thicker condoms described as "extra safe" or "extra strong" are more resistant to tearing under the higher friction of anal sex. Whatever type you choose, ensure the nominal width is the right fit for you - a condom that is too tight is more likely to break; one that is too loose is more likely to slip. Use our condom size guide to find your correct size.
What is an internal condom and can you use one for anal sex?
An internal condom (sometimes called a female condom) is a nitrile pouch that is inserted into the body before sex, creating an internal barrier. Internal condoms can be used for anal sex by inserting the closed end into the anal canal before penetration. Because they are made from nitrile rather than latex, they are compatible with all lubricant types including oil-based, and are a suitable option for people with a latex allergy. The receptive partner can insert them independently in advance of sex.
What are the risks of rimming (anilingus)?
Rimming - oral contact with the anus - carries transmission risk for hepatitis A, hepatitis B, shigella, herpes, gonorrhoea, syphilis, and HPV. The risk of HIV transmission through rimming alone is very low but not zero. Using a dental dam (a thin sheet of latex or polyurethane held over the anus) or a cut-open condom as a barrier reduces transmission risk significantly. Hepatitis A and B can be prevented by vaccination - ask your GP or sexual health clinic about this if you are not already protected.
