Sexually transmitted infections (STIs) can affect both men and women, although the symptoms may appear differently depending on the sex. In men, common symptoms include increased genital discharge and pain during urination. In women, typical symptoms include changes in vaginal discharge, itching, and an unpleasant odor. However, some sexually transmitted infections may produce no symptoms at all, which can lead to the condition being left untreated.
There are also various types of STI tests. Blood-based STD tests can diagnose several infections, including HIV, syphilis, and herpes simplex virus (HSV). With recent advances in blood testing technology, results for HSV type 1 and type 2 can now be obtained more quickly than in the past.
Timing is particularly important when undergoing STI testing after a suspected exposure. In general, HIV testing can be performed from about 10 days after the suspected date of infection. Syphilis testing usually becomes reliable approximately four weeks after exposure. In cases of urethritis, a Multi-PCR genetic test can often detect infection within one to two days after sexual contact.
The cost of STI testing varies depending on the type of test performed. When covered by national health insurance in Korea, basic testing—such as a 12-type STD PCR test and STI blood screening—can usually be performed at a reasonable cost. However, additional testing for human papillomavirus (HPV) may require extra fees. Some patients hesitate to undergo testing due to cost concerns, but delaying testing can lead to more serious complications if the optimal treatment window is missed. For this reason, testing is recommended if there has been a suspicious sexual encounter.
Certain sexually transmitted pathogens, such as Neisseria gonorrhoeae (the bacterium that causes gonorrhea) and Chlamydia trachomatis, may not produce noticeable symptoms. If these infections remain undetected and untreated, they can lead to infertility, chronic inflammation, and other complications. Therefore, early testing and prompt treatment are important.
Some organisms, such as Ureaplasma urealyticum and Ureaplasma parvum, are sometimes considered commensal bacteria that can exist in the body without causing symptoms. Because these organisms are relatively common, treatment may not always be necessary if no symptoms are present. Patients who receive a positive test result but have no symptoms may wonder whether treatment is required or worry about transmitting the infection to a partner. In such cases, it is advisable to consult with a physician to determine whether antibiotic treatment is appropriate. After treatment, follow-up testing is recommended to confirm that the infection has been fully resolved.
Dr. Lee Chang-gi of Goldman Urology Clinic’s Incheon branch emphasized that STI testing is something anyone may need at some point, and it should never be considered embarrassing or shameful. He added that sexually transmitted infections are easier to treat when detected early, and that obtaining accurate information and seeking care from a urology specialist is the most important step toward effective treatment.