
STI videos
Peer reviewed by Dr Colin Tidy, MRCGPAuthored by Lawrence HigginsOriginally published 9 Jun 2025
- DownloadDownload
- Share
Sexually transmitted infections (STIs) can affect anyone who is sexually active, and knowing the facts helps you stay safe and healthy. Our expert-led videos cover all the common types of STIs, how to spot symptoms, how to get tested, and what the treatments are.
In this article:
Continue reading below
Overview
An STI (sexually transmitted infection) is an infection passed through sexual contact. You can find out if you have an STI by doing a test.
How do you find out if you have an STI?
Genital warts
Genital warts are small, soft lumps that appear on the genital or anal area. They are caused by human papillomavirus (HPV), and you usually get them through skin-to-skin contact during sexual activity.
How do you get genital warts?
Do genital warts go away on their own?
Continue reading below
Chlamydia
Chlamydia is a common STI caused by the bacteria, Chlamydia trachomatis. It is passed on through unprotected sex. Symptoms may include pain when peeing, unusual discharge, or discomfort in the lower tummy.
What is chlamydia?
What are the symptoms of chlamydia?
How can you test for chlamydia?
How can you treat chlamydia ?
Gonorrhoea
Gonorrhoea is a STI caused by the bacteria, Neisseria gonorrhoeae. Symptoms can include pain or burning when you pee, unusual discharge from the genitals, and sometimes soreness or swelling.
What is gonorrhoea?
What are the symptoms of gonorrhoea?
How do you test for gonorrhoea?
What is the treatment for gonorrhoea?
Continue reading below
HIV
HIV (human immunodeficiency virus) is a virus that attacks the immune system, making it harder for your body to fight infections. You can catch HIV by having unprotected sex with someone who has the virus.
What are HIV and AIDS?
How do I get tested for HIV?
Syphilis
Syphilis is a STI caused by the bacteria, Treponema pallidum. It can cause sores, rashes, and serious health problems if left untreated.
What is syphilis?
What are the stages of syphilis?
Trichomoniasis
Trichomoniasis is a STI caused by the parasite, Trichomonas vaginalis. You usually get it through unprotected sex with someone who is infected.
How do you get trichomoniasis?
Urethritis
Urethritis is an inflammation of the urethra-the tube that carries pee out of the body. It is often caused by infection and can lead to symptoms such as pain or burning when you pee.
What is urethritis infection?
Article history
The information on this page is peer reviewed by qualified clinicians.
9 Jun 2025 | Originally published
Authored by:
Lawrence HigginsPeer reviewed by
Dr Colin Tidy, MRCGP

Ask, share, connect.
Browse discussions, ask questions, and share experiences across hundreds of health topics.

Feeling unwell?
Assess your symptoms online for free