Font Size


Chancroid is a sexually transmitted infection (STI) caused by the Haemophilus ducreyi bacterium. It causes painful open sores (ulcers) in the genital area and swelling of the lymph nodes in the groin.

Chancroid is not common in the United States but is more common in patients who also have human immunodeficiency virus (HIV) infection. Some people who have chancroid are also infected with syphilis or genital herpes (HSV).

Without proper treatment, ulcers require longer periods to heal, which increases the likelihood of getting or transmitting HIV infection.

Successful treatment with antibiotics cures the chancroid infection, relieves symptoms, and prevents transmission to others. In extensive cases, scarring can occur despite successful treatment.

ByHealthwise Staff
Primary Medical ReviewerSarah Marshall, MD - Family Medicine
Specialist Medical ReviewerDevika Singh, MD, MPH - Infectious Disease
Last RevisedSeptember 29, 2011

eMedicineHealth Medical Reference from Healthwise

This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

To learn more visit

© 1995-2014 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.

Medical Dictionary