Chancroid - Also called "soft sore," is a  venereal infection causing ulceration of the lymph nodes in the groin. The pustules burst to form painful ulcers.

Sexually Transmitted Diseases (Bacterial) - (std) -  Any disease (such as syphilis, gonorrhea, AIDS, or a genital form of herpes simplex) that is usually or often transmitted from person to person by direct sexual contact. Sexually transmitted diseases usually affect initially the genitals, the reproductive tract, the urinary tract, the oral cavity, the anus, or the rectum but may mature in the body to attack various organs and systems.

Syphilis - Systemic disease that is usually transmitted through sexual contact, but it occasionally occurs congenitally from infection in the mother.