A bubo (Greek boubôn, "groin") (plural form: buboes) is swelling of the lymph nodes. It is found in infections such as bubonic plague, gonorrhea, tuberculosis or syphilis. It is similar in appearance to a huge blister, and usually appears under the armpit, in the groin or on the neck. According to historical records, buboes were characteristic of the pandemic responsible for the Black Death and perhaps other ancient pandemics. At the time of such pandemics, it was commonly believed by doc… (More on Bubo)