Sexually transmitted infections (STIs) are infections that spread during sex and sexual contact. Most STIs are passed between partners who have oral, vaginal or anal sex without using condoms. Many people with STIs have no symptoms and do not know they have an infection. Tests are the only way to know if you have an infection.

STIs can affect anyone. But don’t worry. Our STI testing is free and discreet. And most STIs can be easily treated.

STI symptoms

Different infections will have different symptoms but can include:

  • unusual discharge from your anus or genitals

  • itchiness, pain and redness in your genital area

  • pain when you pee

  • noticeable bumps or sores around your genitals

  • pain inside your body, around your stomach or your groin

Sometimes you will get no symptoms at all. Or the symptoms will take a long time to show. This means you could be passing infections on to other people without knowing it.

The only way to know you have an infection is to take an STI test.

Common STIs


Chlamydia is a common bacterial infection. It's easy to treat with antibiotic tablets.

Genital herpes

Genital herpes is a common infection caused by the herpes simplex virus (HSV). Outbreaks will usually heal without needing treatment.

Genital warts

Warts are an infection caused by a human papillomavirus (HPV). Treatment can remove visible warts.


Gonorrhoea is a common bacterial infection. It needs an antibiotic injection to treat.

Hepatitis B

A virus that can damage the liver. A free vaccine is available for those most at risk of infection.

Hepatitis C

Hepatitis C is a virus that can infect and damage the liver. It can be treated with antiviral medication.


HIV is a viral infection that attacks the body's immune system. Treatment can make the virus undetectable and untransmittable.

Pubic lice

Lice - also called crabs - are tiny insects that live in pubic hair. They can be treated using a medicated cream or shampoo.


Syphilis is a bacterial infection that has 3 stages. It can be treated with antibiotics.


Trichomoniasis is caused by a tiny parasite called Trichomonas vaginalis. It’s easily treated with tablets.

When should I test?

STIs don’t show up in tests immediately. You’ll need to wait a few weeks - called the window period - so that you can get an accurate test result.

Free, discreet and confidential

Our STI tests are delivered in the post and can be done at home. We’ll text you your results. And if you need any advice, support or treatment, our clinical team can help you with that too.

Getting your SH:24 test results

Every kit has to be sent back to the lab where they test your samples. There’s a Freepost box included in your kit so you can post everything to the lab. SH:24 is discreet and confidential, so your name or details will not appear on any of the samples or the box.

Once your kit arrives at our labs, we’ll keep you updated by text message. We’ll text you when your samples arrive at the lab. And we’ll text you about your results as soon as we can - always within 7 days.

If you do have an infection, we’ll help you get treatment and further support.

If our free service is not available in your area, you can buy STI test kits from

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