When you don’t know whether the other person has any infectious diseases after having sex, you can go to the hospital to get tested for infectious diseases such as AIDS and syphilis. After having high-risk sex, you must go to the regular hospital to check the series of infectious diseases and other tests, including syphilis, AIDS and other diseases that can be transmitted through sexual behavior. But AIDS and syphilis are diseases that have a window period. Therefore, after 6 weeks after high-risk sex, you can check for HIV antibodies to see if there is any HIV infection. A negative result does not mean that there is no infection, and the test should be repeated regularly. The incubation period of syphilis is usually around 2~4 weeks, and it is best to check the syphilis series in the third week or so, and then review the test regularly until it remains negative after 3 months, which can be ruled out for the time being. In addition, be sure to closely observe any rash, or other clinical symptoms appear. If there is any discomfort, please seek medical attention immediately. Avoid sexual misconduct as much as possible.