Syphilis, which the bacterium Treponema pallidum causes, is a form of sexually transmitted infection. There are four stages of syphilis. The infection can be serious or cause severe complications ...

Secondary syphilis is the second stage of untreated syphilis. A non-itchy rash, sore throat, fatigue, joint pain, fever, and wart-like patches are possible symptoms. If you don’t get treatment for the ...