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Possible STI exposure (testing needed)

Also called: STI exposure, possible STD exposure, STI testing

If you had sex without a condom or learned a partner has an STI, testing and sometimes treatment can protect your health and your partners'. Many STIs have no symptoms.

TypeTesting and prevention
Key factMany STIs have no symptoms
HIV preventionPEP within 72 hours

Overview

Common STIs include chlamydia, gonorrhea, syphilis, trichomoniasis, herpes, HPV, and HIV.

Some tests need time after exposure to turn positive, so you may need repeat testing.

Symptoms

Common signs:

  • Recent sex without a condom, or a partner with an STI

Less common

  • Discharge
  • Burning when peeing
  • Sores

Look up a symptom: Recent sex without a condom, or a partner with an STI

When to get medical care

Call 911Severe belly pain with fever, or fainting.
Get care todayPossible HIV exposure in the last 72 hours (ask about PEP), or pain, fever, or sores.
See a doctor soonAny new partner without condoms: get tested.

Causes

Sexual contact with someone who has an STI.

Who is more likely to get it

  • New or multiple partners
  • No condoms

Possible complications

Diagnosis

A healthcare professional asks about your exposure and tests.

Questions you may be asked

  • When it happened and what kind of sex
  • Symptoms

The exam

A genital exam if you have symptoms.

Tests

Tests, if needed:

  • Urine or swab tests: Chlamydia, gonorrhea, trich.
  • Blood tests: HIV, syphilis, hepatitis.

Treatment

Get tested and treated, and tell partners.

Self-care

  • Don't have sex until you and partners are treated
  • Use condoms
  • Ask about PrEP if you're at ongoing risk for HIV

Medicines

Medicines that may help:

MedicineHelps withGood to know
HIV PEP
Preventing HIV after exposureMust start within 72 hours, the sooner the better.
Doxy-PEP
Lowering some STIs for certain peopleAsk if it's right for you.

OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.

Prevention

To prevent STIs:

  • Use condoms
  • Get tested regularly
  • Get HPV and hepatitis B vaccines

Which doctor treats this

  • Urgent care or the ER can treat it first. For minor problems, your primary care provider can help.
  • They may send you to a sexual health clinic, an OB-GYN, or a urologist; your local health department can test for free or low cost.

Back to school, work, or sports

  • Most people can go to school or work. Keep the wound clean and covered.
  • Avoid pools and hot tubs until the skin heals.

Outlook

Most STIs are curable or treatable, especially when found early.

Getting ready for your visit

Bring a list of your symptoms and medicines.

Questions to ask

  • Which tests do I need and when?
  • Should I take PEP or PrEP?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on Possible STI exposure (testing needed)

Sources

Last updated 2026-11-12.