If you are sexually active there is a risk of picking up a sexually transmitted infection (STI), regardless of your age or sexuality. Sexually transmitted infections are passed from one person to another through unprotected sex or genital contact. It is recommended that you regularly get tested, as part of practicing good sexual health.
Many people with sexually transmitted infections (STIs) do not get symptoms, so it's worth getting tested even if you feel fine. If you think you have an STI, the earlier you're tested, the sooner treatment can be given if it's needed.
You cannot tell by looking at someone (including yourself) whether they have an infection, so it's important to get a check-up if you have had unprotected sex or think you might be at risk.
Some infections have no symptoms but can cause serious health problems if left untreated, which makes it even more important that you regularly have a sexual health check up to test for STIs.