Sexually transmitted infections (STIs) are infections that are primarily spread through sexual contact, including vaginal, anal, and oral sex. Some STIs, such as human papillomavirus (HPV) and herpes simplex virus (HSV), can also be spread through skin-to-skin contact.
STIs can be caused by various types of bacteria, viruses, and parasites, and can have a range of symptoms, including itching, burning, pain during urination, and discharge. Some STIs can also be asymptomatic, meaning they do not cause symptoms, but they can still be passed on to others.
In the UK, some of the most common STIs include Chlamydia, Gonorrhea, Syphilis, and Genital Herpes. Other common STIs include Genital Warts (caused by HPV), hepatitis B and C, and Human Immunodeficiency Virus (HIV).
It’s important to practice safe sex, such as using condoms, to reduce the risk of contracting or spreading STIs. Regular STI testing and prompt treatment can help prevent the spread of STIs and protect sexual health.
Page last reviewed: 6 August 2024