Getting tested for sexually transmitted infections is a responsible step for anyone who is sexually active. But even with good intentions, people often go into a screening appointment with misconceptions or habits that can affect the accuracy of results or their overall experience. Understanding what not to do beforehand is just as important as the decision to get tested.
Many people assume that as long as they feel fine and have no symptoms, a screening will be straightforward. However, two common mistakes can complicate the process or lead to false reassurance. Here is what health experts want you to know before your next sexual health check-up.
Assuming you can’t get an STI from oral sex
One of the most widespread errors is believing that oral sex carries no risk of sexually transmitted infections. This misconception often leads people to skip testing for infections that can be transmitted orally. According to Dr. Tanaya Narendra, known as dr_cuterus on Instagram, oral sex is a highly effective route for transmitting STIs. She notes that flavored condoms exist specifically to make protection during oral sex more palatable and should be used unless both partners have been recently tested.
Leeza Mangaldas, a prominent sex-positive educator, reinforces this point. She explains that infections like HPV and herpes can be contracted through unprotected oral contact, regardless of whether semen is swallowed. Simply licking or coming into contact with genital skin is enough for transmission. This means that a screening focused only on vaginal or anal exposure could miss infections present in the mouth or throat.
What this means for your screening
If you engage in oral sex, your screening should include throat swabs for certain infections. Many standard panels only test for urine or blood-borne STIs. Ask your clinician specifically whether oral exposure is covered in the tests being ordered. Failing to do so is the first common mistake that can leave you with an incomplete picture of your sexual health.
Relying on symptoms to know if you need testing
The second major mistake is waiting for symptoms like sores, discharge, or pain before scheduling a screening. Many STIs, including chlamydia, gonorrhea, and HPV, can be asymptomatic for long periods. Dr. Shilpa Ghosh, director of obstetrics and gynecology at Aakash Healthcare, notes that conditions like genital herpes may only show subtle signs such as mild redness or small bumps that can be mistaken for ingrown hairs or irritation.
If symptoms do appear—such as sores around the mouth or genitals, rashes, or burning during urination—it is crucial to see a medical professional promptly. But waiting for these signs before testing means you may have been unknowingly transmitting infections to partners. Screening should be based on sexual activity and risk factors, not on the presence of visible problems.
“If you have had unprotected oral, vaginal, or anal sex with a new partner, or if you have multiple partners, testing every three to six months is recommended even when you feel perfectly healthy.” — Dr. Shilpa Ghosh
What to do instead: practical steps before screening
Avoiding these mistakes is straightforward with a little planning. First, be honest with your healthcare provider about all types of sexual activity you engage in—oral, anal, vaginal, and any use of barriers. This ensures the correct tests are ordered. Second, do not urinate for at least one to two hours before a urine-based test, as dilution can affect accuracy. Third, if you are due for a blood test for HIV or syphilis, no special preparation is needed, but knowing your last potential exposure date helps the clinician interpret results correctly.
Finally, remember that a negative result today does not guarantee you are still negative next week. Sexual health screening is a recurring practice, not a one-time event. By avoiding these two common errors—neglecting oral exposure and waiting for symptoms—you make your screening far more useful and protect both your own health and that of your partners.
