Sexually transmissible infections – or STIs – are infections that can be passed on through vaginal, anal, or oral sex. Most STIs are transmitted in sexual fluids, but some can be passed on from skin-to-skin genital contact.
Most STIs don’t have symptoms and you might never know you have been infected with one. But if you do get symptoms, the most common ones are itching, pain when peeing, sores or blisters, lumps, or a discharge from your vagina or penis.
Last updated on 11/08/2021