Syphilis is contagious because it is an infectious and sexually transmitted disease. This disease is a national legal infection and belongs to the second category of infectious diseases, so the degree of transmission of this disease is very strong. It requires strict clinical treatment, isolation and prevention of transmission. The disease can be transmitted in three ways, through sexual intercourse, vertical mother-to-child transmission and blood-borne transmission. If you do a good job of preventing and treating syphilis, in addition to actively treating syphilis, you also need to isolate the contaminated objects of syphilis patients in your daily life and work, try to avoid direct contact with the patient’s broken skin, as well as the patient’s medical practices, including oral hygiene and the use of sterilized items, etc. need to pay attention to.