If a man is infected with syphilis, his life expectancy will not be affected in most cases if he is actively treated, but his life expectancy will be affected if he is not treated in time or if he is left untreated. The syphilis is a sexually transmitted disease caused by the syphilis spirochete infection, according to the clinical manifestations can be divided into a period of syphilis, the second period of syphilis, the third period of syphilis, latent syphilis and congenital syphilis, etc., the first choice for treatment of penicillin type of drugs. Early syphilis and early latent syphilis belong to the early syphilis, the main clinical manifestations of skin and mucous membrane lesions, the damage to the internal organs is small. Therefore, early syphilis can be cured by regular treatment, not infectious, and has little effect on normal life. In contrast, advanced syphilis may cause serious damage to internal organs, such as the nervous system and cardiovascular system. Treatment of advanced syphilis has a role in symptomatic relief, but it can significantly affect normal life expectancy due to severe tissue damage and a higher risk of complications. Therefore, if you are diagnosed with syphilis, it is important to go to a regular hospital as soon as possible for active treatment. Meanwhile, during treatment, take protective measures to avoid cross-infection.