Basic syphilis and STDs fact sheets are presented in plain language for individuals with general questions about sexually transmitted diseases. Syphilis is a sexually transmitted disease (STD) that can have very serious complications when left untreated, but it is simple to cure with the right treatment. Without treatment, the infection will usually develop into secondary syphilis between three and six weeks after the sore appears.
Read more: Do I Have Syphilis? Signs and Symptoms of Syphilis