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How are STIs/STDs Diagnosed?

A health care professional can diagnose STIs. They will ask personal questions about your sex history. It’s important to be honest so you can get help. They may take a sample of fluid from the vagina or penis, or a blood test to confirm the problem. Laboratory tests can show what, if any, bacterial or viral STIs are present.

  • Blood tests can show if you have a disease that infects the blood.
  • Urine samples can show if you have a bacteria in your urine from an STI.
  • Fluid samples can show if you have active sores and help diagnose the type of infection.