You don’t always notice symptoms if you have an STI. Many people don’t notice symptoms and most people with chlamydia have no symptoms. You won’t always know if you’ve got an STI and you can’t tell by looking if someone has one. Protect yourself by always using a condom. If you’re worried, visit your GP or sexual health clinic.
Source: Sex myth buster @ NHS Choices
image by juanerasmus85 under CC0 license
