Puberty Sex information - Teenage Boys


STD/STI - Chancroid

Why didn't someone warn me about this?
image of regretAny sex act with another person could give you this infection!

Street Names for Chancroid

soft chancre, soft sore, soft ulcer

Facts about Chancroid

  • Caused by a capsule-shaped bacterium called Haemophilus ducreyi.
  • About 4000+ cases in U.S. each year.
  • Spread by direct contact with a sore during any sex act.
  • Ejaculation not needed to spread infection.
  • No mother to baby transmission.
  • Not spread by toilet seats or clothes.


image of chancroid
  • Starts as tender bump on penis, inside or outside the vagina, rectum or anywhere.
  • 1-2 days later, the bump becomes a shallow sore that opens and deepens. Becomes painful and full of pus.
  • Lymph glands in groin get infected and swell so much they can burst. This swelling is called a bubo. The pus from the sore is infectious.
  • Sores may last for weeks and take months to heal.

image of chancroidBubos and lesions due to Chancroid


  • The correct antibiotic will kill the bacterium. Your doctor determines which antibiotic to use.
  • No over-the-counter drugs work.
  • Chancroid can occur repeatedly and at the same sites.


image of happy guy
  • Only 100% completely safe option - choose not to have sex!
  • Latex condoms help but sores can be on or away from the penis.

More information

image of doctorIf you have further questions or concerns about STDs, ask Dr. Mike, an internationally known Clinical Microbiologist specializing in STDs. He has worked extensively with teenage boys and contributed all the information on the STD pages. (Change the (at) to @ and the (dot) to . in the email address below)

jmm8 (at) comcast (dot) net

Tell Dr Mike how old you are, what country you are from and then write your message. You will be emailing a specialist offering his time to help young guys! Your email will be treated confidentially and erased after he answers you!

Get Answers!  Get Help!  Get Smart!

Take Responsibility for yourself!


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