Chlamydia is a sexually transmitted infection (STI) that can be caused by any type of sexual contact, including vaginal, anal, or oral sex. It can be very serious and often leads to infertility. Chlamydia is most commonly spread through sexual contact with an infected person, although it can also be spread through other activities such as kissing and sharing needles. Chlamydia is easily treated with antibiotics if it's detected early enough, but if left untreated, it can lead to serious health problems such as pelvic inflammatory disease (PID), premature birth, and even death. so make sure you get tested for chlamydia if you're ever concerned about your STI status.