Sexually transmitted diseases have been the number one killer of human health, and the incidence of syphilis has been increasing significantly. Due to the lack of knowledge about sexually transmitted diseases, it is wrong to think that you can only get infected with STDs if you have sex. You must use scientific treatment to control the syphilis condition in time. The actual syphilis infection is what? The following are the ways of infection of syphilis: 1, direct sexual contact transmission: unclean sexual intercourse is the main cause of infection syphilis, syphilis is almost always caused by sexual contact, syphilis patients are the source of infection, strong transmission rate of infection is high, usually 7-60 days after the onset of infection. Untreated syphilis patients, the most infectious in the first year, the patient’s skin, mucous membrane damage surface has a large number of syphilis spirochetes. Therefore, where and these patients have sexual contact (including homosexuality), skin and mucous membrane contact to the disease overwhelming damage, can be infected with syphilis. 2, blood-borne transmission: blood transfusion infected in the blood donor, through maternal transmission. Pregnant women with syphilis can be transmitted to the fetus through the placenta, causing intrauterine infection in the fetus, which mostly occurs after the fourth month of pregnancy, resulting in miscarriage, premature birth, stillbirth or delivery of fetus-borne syphilis children. 3, indirect transmission: kissing and shaking hands with syphilis patients. Syphilis patient’s skin lesions or contact with syphilis patient stained objects and utensils and be infected, such as contact with syphilis patient contaminated clothing, utensils, towels, foot cloths, foot basin or even toilet toilet ring or contaminated medical equipment caused by the indirect transmission of syphilis. 4, trauma infection: syphilis germs can be invaded by a small rupture wound on the skin or mucous membrane, after a few days of incubation germs multiply to a sufficient number will begin to develop, so be careful with the rupture wound.