Yes, people can have more than one sexually transmitted infection (STI) at once. Condomless sexual contact with a person who has more than one STI, or sex with multiple partners with STIs may result in transmission of one, many or none at all. Repeated condomless sex may mean repeated exposure to different STIs.
STIs are common and most people who are sexually active experience having an STI at least once in their lifetime. STIs don’t always have noticeable symptoms so the only way to know for sure is to get tested.
Correct and consistent use of condoms (internal and external) can significantly reduce transmission. Other safer sex tools like dental dams and lube can also reduce the risk of transmission. Regular testing is a great tool for an early diagnosis and successful treatment.