The main precautions to be taken before gynecological examination are not to drink alcohol or stay up late the day before the examination, and to avoid sexual intercourse, because pathogens may be brought into the vagina during the examination, and if the vaginal environment changes after sexual intercourse, the local resistance decreases and infection may easily occur, so the chance of infection increases. The vaginal wall and the cervix may become congested and edematous after sexual intercourse, which may affect the normal observation, especially in women with cervical lesions. After the examination, it is necessary to take more rest and observe whether there is irregular vaginal bleeding, abdominal pain and other uncomfortable symptoms. It is recommended to wear loose, cotton and breathable underwear.