Sexually Transmitted infections (STIs)

Couple kissing sunset

Sexually Transmitted Infections (STIs) are infections that are passed from one person to another through vaginal, anal or oral sex, by genital contact and/or through sharing sex toys.

You don’t need to have lots of sexual partners to get an infection. If you don’t use a condom you have a much higher risk of getting an STI than if you do.

Safer sex involves using condoms correctly from the start until the end of having sex and every time you have sex.

If you are found to have one STI, you should get a tested for other STIs, because you may have another at the same time that gives no symptoms.

More information on each STI (and some other genital conditions) is shown further down this page.

Symptom Checker

What is a Symptom?

A symptom is something that is happening to your body that is not normal for you.  It doesn’t have to be something that you know is linked to an infection (like pain when you pee) it is simply something that is not right for you.  It might be a sign that you have a sexually transmitted infection (STI).

Try our symptom checker to learn more.  To start, click on which type of genitals (sexual organs) you have...


Symptom Checker Female                  Symptom Checker Male

Different STIs

Click on the buttons below to learn more about specific STIs. The ones in blue can give genital symptoms, but are strictly speaking not sexually transmitted.

Bacterial Vaginosis (BV)     Chlamydia     Genital Herpes     Genital Warts   

Gonorrhoea     Hepatitis B     Hepatitis C     HIV

Lymphogranulomar Venereum (LGV)     Molluscum Contagiosum     

Non-Specific Urethritis (NSU)     Pelvic Inflammatory Disease (PID)

Pubic Lice (Crabs)     Scabies     Syphilis   

Thrush (Candida)     Trichomonas Vaginalis (TV)