Syphilis

Syphilis is a bacterial infection usually spread by sexual contact. The disease starts as a painless sore on your genitals, mouth or another part of your body. If untreated, syphilis can damage your heart and brain.

Syphilis rates in the United States have been rising since 2000. Nearly two-thirds of new infections occur in men who have sex with men, according to the Centers for Disease Control and Prevention. Rates have also risen among young women. Syphilis affects a higher percentage of African-Americans than whites.

Syphilis progresses in stages and can lead to serious complications or death. Having syphilis also makes you more vulnerable to HIV. When caught early, syphilis can be cured with antibiotics.