Having unprotected sex. People who do not use
condoms have a higher risk of getting an STI.
Being sexually active
at an early age. Sexual activity before age 18 may increase the risk of getting
an STI, because teens may have more sex partners or they may be less likely to
use condoms to reduce their risk. Girls younger than 18 get STIs 2 to 3 times
more often than those older than 18. The cells of the
transformation zone of the cervix are more susceptible
to infection in teen girls.
Having more than one sex
Having a high-risk sex partner (one who has other sex
How this information was developed to help you make better health decisions.