A bacterial infection usually spread by sexual contact that starts as a painless sore.
Overview
Syphilis is a bacterial infection usually spread by sexual contact. The disease starts as a painless sore, usually on the genitals, rectum, or mouth. It's spread by contact with these sores.
Symptoms
Syphilis develops in stages, and symptoms vary with each stage. After the initial sore heals, a rash may appear.
Treatments
Syphilis is treated with penicillin.
