It is not necessary to get AIDS after high-risk sex, but if you do get AIDS, most of them will have symptoms of upper respiratory tract infection after 1~2 weeks, but a few infected people do not have any symptoms even after infection. It is recommended to visit the hospital in time and follow the medical advice for treatment. After high-risk sex, the prevalence of AIDS is not 100%, so you should go to the hospital in time to improve the examination, such as HIV antibody test examination, to detect whether there is infection. Most people infected with HIV will have symptoms of upper respiratory tract infection such as fever, cough, sore throat, generalized weakness, limb aches and pains in 1~2 weeks, and a few of them will also have dizziness, rash, acute encephalitis, acute polyneuritis, cervical lymph nodes, and enlarged liver and spleen, and other symptoms. However, due to the incubation period of HIV, some patients may not show symptoms after infection. It is recommended to go to the hospital in time for diagnosis and treatment under the guidance of a doctor.