Go to a sexual health or GUM clinic if you have any of the symptoms listed below. In women: yellow or green discharge from your vagina, or discharge that smells bleeding during or after sex bleeding between periods pain during sex pain in your lower abdomen In men: discharge from your penis pain in your testicles In women and men: pain when passing urine itching, burning or tingling around your genitals blisters, sores, spots or lumps around your genitals or anus black powder or tiny white dots in your underwear (this could be droppings or eggs from pubic lice) Some health practices, pharmacies, contraception clinics and young people's services may also provide testing for some STIs. Not everyone with an STI has symptoms. You should get checked if: you've had unprotected sex with a new partner you or your sexual partner have had sex with someone else without using a condom your sexual partner has any symptoms you're planning to get pregnant and may have been at risk of infection.