Chancroids is a sexually transmitted bacterial infection that causes painful sores on the genitals. Its medical name is Haemophilus ducreyi. There are several synonyms for chancroids, including soft chancre, bubo, and venereal ulcer. The term "soft chancre" is used because the sores are soft to the touch and can easily break open. Bubo refers to the swollen lymph nodes that may accompany the infection, and the term "venereal ulcer" is self-explanatory. It is important to seek medical attention if you suspect you have chancroids or any other sexually transmitted infection. Treatment includes antibiotics and abstaining from sexual activity until the infection has cleared.