Syphilis cannot be completely ruled out based on the absence of symptoms, and a syphilis serum antibody test is needed to make a determination. Syphilis is a sexually transmitted disease (STD) caused by infection with the syphilis spirochete, and is usually transmitted sexually, from mother to child, and through the bloodstream. Syphilis has an incubation period, and after infection with the spirochete syphilis, some patients may develop symptoms in about two weeks to three months, while others may remain asymptomatic. Since each patient has symptoms at a different time and manifests differently, you cannot rule out syphilis simply by relying on whether or not you have symptoms. You should go to the hospital for serum antibody testing to rule out syphilis infection. In summary, if you have high-risk behaviors, you need to go to the hospital in time to get a clear diagnosis.