Sexually transmitted diseases (STDs) — or sexually transmitted infections (STIs) — are generally acquired by sexual contact. The bacteria, viruses or parasites that cause sexually transmitted diseases may pass from person to person in blood, semen, or vaginal and other bodily fluids.

The symptoms of an STI can include:

• an unusual discharge from the vagina, penis or anus
• pain when peeing
• lumps or skin growths around the genitals or bottom (anus)
• a rash
• unusual vaginal bleeding
• itchy genitals or anus
• blisters and sores around your genitals or anus
• warts around your genitals or anus
• warts in your mouth or throat, but this is very rare