What are the symptoms of sexually transmitted diseases (STDs) or sexually transmitted infections (STIs)?

People with STDs/STIs may feel ill and notice some of the following signs and symptoms:1,2

  • Unusual discharge from the penis or vagina
  • Sores or warts on the genital area
  • Painful or frequent urination
  • Itching and redness in the genital area
  • Blisters or sores in or around the mouth
  • Abnormal vaginal odor
  • Anal itching, soreness, or bleeding
  • Abdominal pain
  • Fever

In some cases, people with STIs have no symptoms. Over time, any symptoms that are present may improve on their own. It is also possible for a person to have an STI with no symptoms and then pass it on to others without knowing it.

If you are concerned that you or your sexual partner may have an STI, talk to your health care provider. Even if you do not have symptoms, it is possible you may have an STI that needs treatment to ensure your and your partners’ sexual health.


  1. NIH (2008). Understanding, treating, and preventing STDs/Questions to ask your health care professional. NIH Medline Plus, 3(4), 18–19. Retrieved December 22, 2015, from http://www.nlm.nih.gov/medlineplus/magazine/issues/fall08/articles/fall08pg18-19.html
  2. Womenshealth.gov. (2009). Sexually transmitted infections (STI). Retrieved December 22, 2015, from http://womenshealth.gov/publications/our-publications/fact-sheet/sexually-transmitted-infections.html 
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