A sexually transmitted disease which may or may not have symptoms. Symptoms in the first stages can include painless sores on the genitals, anus, or mouth and enlarged lymph nodes in the area around the sore. Syphilis can be cured with antibiotics. If left untreated, syphilis can permanently damage the brain, nerves, eyes, heart, blood vessels, liver, bones, and joints. This damage includes paralysis (not being able to move or feel a part of the body), numbness, blindness, dementia, and even death.