Sexually transmitted diseases often have a certain incubation period, some diseases do not appear serious symptoms in the short term after infection, such as early detection, you can avoid serious damage, for a complete cure. The early symptoms of sexually transmitted diseases can be summarized as follows: 1, urethral discharge: if the urethra appears purulent discharge, viscous amount of yellow, especially in the morning, it may be acute gonorrhea; if the urethra has a transparent viscous discharge, the amount is small, it may be non-gonococcal urethritis. 2, the urethra will have an itching sensation. If men have this symptom, it is mostly considered as non-gonococcal urethritis or early reaction of gonococcal urethritis. The male has frequent urination, urgent urination, painful urination, redness and swelling of the urethra. If the male has this symptom, if it is accompanied by painful erection of the penis at night, it is mostly considered as acute gonorrheal urethritis. 4, women with increased leucorrhea with cervical inflammation, also consider the possibility of infection gonorrhea or non-gonococcal cervicitis. 5, vulva superfluous: if in the vulva or perianal area, there are multiple papules, burr-like or cauliflower-shaped, to consider condyloma acuminata; if the vulva or perianal area appears moist flat papules, to consider the consideration of the second stage of syphilis. 6. Vulvar ulcers: if they are single painless ulcers with dirty surface and cartilage-like hardness, they are mostly considered as hard chancre of syphilis; if they are single soft ulcers, they are to be considered as soft chancre; if multiple ulcers with enlarged inguinal lymph nodes can be considered as genital herpes. 7. Clusters of clear blisters that break quickly, painful at first and itchy at recurrence should be considered genital herpes. 8, vulva or glans itching with erythematous damage, to exclude mycobacterial infection, pubic lice disease and scabies, etc. 9. Multiple rashes all over the body, especially erythematous desquamation of the palms of the hands and feet, not accompanied by itching and pain, need to exclude the possibility of syphilis. It is not that the above symptoms are infections, vulvar damage can also be caused by immune diseases or drug allergies, but once the above symptoms appear, you need to promptly seek medical advice to exclude possible diseases, so as not to miss the disease.