In recent years, as people pay more attention to the health of sexual life, the transmission of STDs through sexual behavior has been effectively controlled, but the transmission through indirect contact has become more common: Sexual transmission: The so-called sexual behavior mainly includes kissing, touching, hugging, sexual intercourse, etc.. Sexual intercourse is the main route of transmission of sexually transmitted diseases, and this route has been controlled in recent years. Indirect contact transmission: Some sexually transmitted diseases, such as gonorrhea, trichomoniasis and fungal infections, can be transmitted through towels, bath tubs, clothing and other supplies, especially in areas with poor economic conditions and low sanitation, through indirect contact transmission occurs, in recent years, this transmission route has become increasingly common. Blood-borne transmission: syphilis, AIDS, gonorrhea can occur pathogenic blood, such as the recipient of such a blood transfusion, can occur transmission of infection. Mother-to-child transmission: Transmission to the fetus through the placenta. Syphilis and AIDS mostly have the risk of mother-to-child transmission. Medical transmission: It is mainly caused by the following reasons: 1, the protection is not strict, this situation mainly occurs in doctors, nurses. 2, sterilization is not strict, the pathogen is not killed, and can infect others when reused. Among the five modes of transmission, STDs are still mainly transmitted through sexual contact. The transmission of non-sexual relations between people, relatively speaking, is still relatively small, but shows a very obvious trend of increase, should be noted. Nowadays, the number of STD patients is increasing, which is related to the growth of society and the change of people’s thinking. We should be clean and ready to prevent STDs as soon as possible. Once suffering from STD harm is also various, the evil loss is incalculable. 1, STD will lead to infertility. Most patients with STDs can be treated as long as they are seen in time. But if not timely, regular treatment, resulting in repeated infection, can cause gynecological inflammation (such as tubal obstruction, etc.), epididymitis, vasectomy, etc., resulting in infertility. 2, STDs can also be accompanied by other complications: condyloma acuminata, genital herpes can sometimes induce vulvar cancer, penile cancer. Genital herpes can sometimes lead to urethral stricture. Syphilis not only invades the skin and mucous membranes, but also invades the organs of the body, eventually leading to death. If a patient is infected with an STD they should be promptly examined and treated. 3, syphilis or non-gonococcal urethritis pathogens can be transmitted to the fetus through the placenta, leading to miscarriage, premature birth, embryonic death, congenital malformations, fetal syphilis; spontaneous abortion is mainly related to gonorrhea, mycoplasma or herpes simplex virus; gonorrhea can cause gonorrhea in newborns, resulting in the birth of defective newborns, but also to neonatal ophthalmia leading to blindness, seriously endangering the health and well-being of the family. 4, when one spouse suffers from STD, the chance of the other spouse being infected with the disease is up to about 70%. In addition, it may also be transmitted to family members through close contact in daily life. Therefore, if there are STD patients in the family should pay attention to disinfection and isolation, and even if there are no obvious symptoms, other family members should also go to the regular professional hospital examination and treatment.