Sexually transmitted infections (STIs) usually pass from one person to another through sexual contact. Most are fairly common, and effective treatment is available — especially in the early stages.
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