Published on:
March 6, 2026
Sexually transmitted infections (STIs) remain one of the most significant public health challenges in the UK, yet many men avoid getting tested — often because they don't know what to look for, feel embarrassed, or assume they'd notice symptoms straight away. The reality is that many STIs every man should know about can be completely asymptomatic, silently causing damage and spreading to partners without any outward sign. Understanding the most common infections, recognising early warning signs, and knowing where and how to get tested are essential steps in protecting your health and the health of those around you.
In this comprehensive guide, we break down the key STIs that affect men in the UK, explore the symptoms you should never ignore, explain the testing process, and outline available treatments — so you can take charge of your sexual health with confidence.
According to data from the UK Health Security Agency (UKHSA), the overall number of newly diagnosed STIs in England remains high, even though figures are still recovering from the disruptions of the COVID-19 pandemic. Young adults and men who have sex with men (MSM) are disproportionately affected, but no sexually active person is immune from risk. Everyone who has condomless sex with new or casual partners is at risk of contracting an STI.
One of the biggest misconceptions among men is that STIs will always produce noticeable symptoms. In truth, infections like chlamydia, gonorrhoea, and HIV can persist for weeks, months, or even years without obvious signs. During that time, untreated infections can lead to serious complications — including chronic pain, infertility, and an increased vulnerability to other infections. They can also be unknowingly passed to sexual partners, perpetuating the cycle of transmission.
Taking a proactive approach to sexual health isn't a sign of anxiety — it's a mark of responsibility. If you're looking for expert, confidential support, a men's health GP can provide tailored advice, testing, and treatment in a discreet and non-judgemental setting.
Chlamydia is the most commonly diagnosed bacterial STI in the UK. It is caused by the bacterium Chlamydia trachomatis and is spread through unprotected vaginal, anal, or oral sex. In men, symptoms may include a white, cloudy, or watery discharge from the tip of the penis, a burning or stinging sensation when urinating, and pain or swelling in the testicles. However, at least half of infected men experience no symptoms at all.
Left untreated, chlamydia can lead to epididymitis — a painful inflammation of the tube that carries sperm — which can, in rare cases, contribute to fertility problems. The good news is that chlamydia is easily treated with a short course of antibiotics, and testing is straightforward, usually requiring only a urine sample.
Gonorrhoea, sometimes called "the clap," is another common bacterial STI. Symptoms in men tend to appear within two weeks of infection and may include a thick green or yellow discharge from the penis, pain when urinating, and occasionally pain or tenderness in the testicles. Like chlamydia, gonorrhoea can also infect the throat and rectum, depending on sexual practices.
Antibiotic resistance in gonorrhoea is a growing concern in the UK and globally, making prompt diagnosis and appropriate treatment more important than ever. Current UK guidelines typically recommend a single injection of an antibiotic, sometimes combined with an oral dose. It is vital to complete the full course and attend any follow-up appointments to confirm the infection has cleared.
Genital herpes is caused by the herpes simplex virus (HSV), most commonly HSV-2, though HSV-1 (traditionally associated with cold sores) can also cause genital infections. Symptoms include painful blisters or sores around the genitals, thighs, or buttocks, tingling or itching in the affected area, and flu-like symptoms during the first outbreak. After the initial episode, the virus remains dormant in the body and can reactivate periodically.
While there is no cure for herpes, antiviral medications can significantly reduce the frequency and severity of outbreaks and lower the risk of transmission. If you're experiencing symptoms or have concerns, you can find detailed information on our herpes simplex page, including how the condition is managed and what to expect from treatment.
Human papillomavirus (HPV) is the most common sexually transmitted virus worldwide. While many strains of HPV cause no symptoms and resolve on their own, certain low-risk strains (particularly types 6 and 11) can cause genital warts — small, flesh-coloured bumps that appear on or around the penis, scrotum, thighs, or anus. High-risk strains of HPV are also linked to cancers of the throat, anus, and penis, although these are less common.
Treatment for genital warts ranges from topical creams to cryotherapy (freezing) or surgical removal, depending on the size and location of the warts. The HPV vaccine, now offered to boys and girls in the UK's national immunisation programme, provides excellent protection against the most harmful strains. You can learn more about diagnosis and treatment options on our genital warts page.
Syphilis is a bacterial infection caused by Treponema pallidum. Once considered rare in the UK, syphilis rates have been rising sharply in recent years, particularly among MSM. The infection progresses through stages: the primary stage typically presents as a painless sore (chancre) on the genitals, anus, or mouth; the secondary stage can cause a body rash, flu-like symptoms, and patchy hair loss; and if left untreated, tertiary syphilis can affect the heart, brain, and other organs years later.
Because primary syphilis sores are painless and can appear in hidden locations, the infection is easily missed without testing. Syphilis is treated with penicillin injections, and early-stage infections respond very well to treatment. Regular testing is essential for anyone at higher risk.
Human immunodeficiency virus (HIV) attacks the immune system, and without treatment it can progress to AIDS. Early symptoms, which may appear two to six weeks after infection, can include a flu-like illness with fever, sore throat, and rash — often mistaken for a common viral illness. After this initial phase, HIV may cause no symptoms for many years while continuing to damage the immune system.
Modern antiretroviral therapy (ART) has transformed HIV from a life-threatening diagnosis into a manageable chronic condition. People living with HIV who take their medication consistently can achieve an undetectable viral load, meaning they cannot pass the virus to sexual partners. Early diagnosis through testing is critical to achieving the best outcomes. Pre-exposure prophylaxis (PrEP) is also available on the NHS for people at high risk of HIV.
While each STI has its own characteristic signs, there are several general symptoms that should prompt any man to seek testing. These include unusual discharge from the penis (which may be clear, white, yellow, or green), pain or a burning sensation when urinating, sores, blisters, bumps, or ulcers on or around the genitals, anus, or mouth, itching or irritation in the genital area, pain or swelling in the testicles, and a rash on the body, palms, or soles of the feet.
It is worth emphasising once more that many STIs — including chlamydia, gonorrhoea, HPV, and HIV — can be entirely asymptomatic. As the UKHSA advises, the only way to know for certain whether you have an infection is to get tested. Waiting for symptoms to appear before seeking help can delay diagnosis and increase the risk of complications and onward transmission.
Some symptoms, such as tingling, stinging, or soreness on the tip of the penis, can be subtle and easy to dismiss. If you notice anything unusual — even if it seems minor — it is always better to err on the side of caution and get checked.
Testing for STIs in the UK is confidential, widely available, and in many cases completely free. There are several routes to access testing, depending on your preferences and circumstances.
Sexual health clinics (GUM clinics): These NHS clinics offer free, confidential testing and treatment for all STIs. You can usually attend without a GP referral, and many offer walk-in appointments. Staff are trained specifically in sexual health and provide a non-judgemental service.
Online testing kits: Many NHS trusts and organisations offer free postal STI testing kits that you can order online, complete at home, and return by post. These typically test for chlamydia, gonorrhoea, syphilis, and HIV.
Your GP: While not all GP surgeries offer comprehensive STI screening, many can arrange blood tests and urine samples, or refer you to a specialist clinic. A private men's health GP can offer a more thorough and convenient service, with faster turnaround times and extended consultations.
Private clinics: For those who prefer discretion and speed, private sexual health clinics offer comprehensive STI panels with rapid results, often within 24–48 hours.
STI tests are usually quick and straightforward. Depending on the infections being tested for, you may be asked to provide a urine sample, have a blood sample taken (for HIV, syphilis, and hepatitis), or allow a swab to be taken from the affected area — such as the urethra, throat, or rectum. Many men are surprised by how simple and painless the process is.
Men who have sex with men and have multiple partners are generally advised to get tested every three months, as they are statistically at higher risk. For other men, annual testing — or testing with each new sexual partner — is a sensible approach. If you've been notified that a partner has an STI, you should seek testing as soon as possible, regardless of whether you have symptoms.
The vast majority of STIs are treatable, and many are fully curable with the right intervention. Prompt treatment not only resolves symptoms and prevents complications but also breaks the chain of transmission.
Bacterial STIs such as chlamydia, gonorrhoea, and syphilis are treated with antibiotics. Treatment is usually short — often a single dose or a brief course — and highly effective when taken as directed. It is essential to complete the entire course of medication, avoid sexual contact until the infection has cleared, and ensure that recent sexual partners are also tested and treated.
Viral STIs such as herpes, HPV, and HIV cannot be "cured" in the traditional sense, but they can be effectively managed. Antiviral medications control herpes outbreaks, genital warts can be removed through various clinical procedures, and HIV is managed with daily antiretroviral therapy that keeps the virus suppressed. Advances in treatment mean that people with viral STIs can live full, healthy lives with minimal impact on their day-to-day wellbeing.
Parasitic STIs such as pubic lice and trichomoniasis are treated with specific antiparasitic medications or topical treatments. These infections are less common but equally important to address promptly.
Treatment and medication for STIs through NHS sexual health services is free of charge. Private services may charge for consultations and tests but often offer the advantage of speed and convenience.
While no method of prevention is 100% effective apart from abstinence, there are several practical steps every man can take to significantly reduce his risk of contracting or spreading STIs.
Use condoms consistently and correctly. Condoms remain the single most effective barrier method for preventing STI transmission during vaginal, anal, and oral sex. There are many options available, including different sizes, textures, and materials for those with latex allergies.
Get vaccinated. The HPV vaccine offers strong protection against the strains of HPV that cause genital warts and HPV-related cancers. Hepatitis A and B vaccines are also recommended for men at higher risk, including MSM. Speak to your GP or a sexual health clinic about which vaccinations may be appropriate for you.
Limit your number of sexual partners and have open, honest conversations about sexual health history with new partners. While this can feel awkward, it is an important part of responsible sexual behaviour.
Get tested regularly. Routine screening is one of the most powerful tools for STI prevention at a population level. By identifying and treating infections early, you help to reduce overall transmission rates. Testing is quick, confidential, and increasingly accessible — there's really no reason to delay.
Consider PrEP if at risk of HIV. Pre-exposure prophylaxis is a daily tablet that is highly effective at preventing HIV infection. It is available free on the NHS for eligible individuals and can be discussed with your GP or sexual health clinic.
The recommended frequency depends on your level of risk. Men with new or multiple sexual partners should consider testing at least once a year, and ideally with each new partner. Men who have sex with men, or those with higher-risk sexual behaviours, are advised to get tested every three months. If a partner notifies you of an STI, you should get tested immediately regardless of symptoms.
Yes — this is one of the most important facts about STIs. Many infections, including chlamydia, gonorrhoea, HPV, syphilis, and HIV, can be completely asymptomatic, especially in the early stages. The only reliable way to know your status is through testing. Assuming you're infection-free simply because you feel well can be dangerously misleading.
STI tests are generally quick and cause minimal discomfort. Most involve a simple urine sample or a blood draw. Swab tests from the urethra, throat, or rectum may feel slightly uncomfortable but are over in seconds. Many men report that the anticipation was far worse than the actual test.
First, try not to panic. Getting tested as soon as possible is the most important step, even if you feel completely well. Avoid sexual contact until you have your results and, if needed, have completed treatment. It takes courage for a partner to disclose an STI, so try to respond calmly and supportively.
Absolutely. Whether you attend an NHS sexual health clinic, order a home testing kit, or visit a private clinic, your results are treated with strict confidentiality. Sexual health clinic records are kept separate from your main NHS medical record and will not be shared with your GP unless you give explicit consent.
Sexual health is an integral part of overall wellbeing, yet it remains one of the areas men are least likely to seek help for. Whether you're experiencing symptoms, have been notified of a potential exposure, or simply want the peace of mind that comes with a clean bill of health, getting tested is always the right decision.
There is no shame in prioritising your sexual health — in fact, it's one of the most responsible things you can do for yourself and your partners. With testing widely available, treatments highly effective, and professional support just a conversation away, there has never been an easier time to take control of your STI status.
The information provided in this article is for educational purposes only and is based on NHS recommendations. It is not a substitute for professional medical advice. Always consult your doctor or a qualified healthcare provider for advice on medical conditions or treatments.
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