Bleeding the day after intercourse is often caused by the following clinical reasons: 1. superfluous organisms in the vagina and cervix, such as vaginal polyps and cervical polyps, which can cause bleeding after contact. 2. inflammation of the vaginal mucosa, due to inflammation, the local mucosa may become congested and edematous, and after sexual intercourse, the local mucosa may break down and cause bleeding, accompanied by increased vaginal discharge. 3. 3.Cervical cancer may cause bleeding after intercourse in the early stage. For this phenomenon, it is recommended to go to hospital for examination in time to know the specific bleeding area, and it is also recommended to do routine leucorrhea examination and cervical cancer screening to know whether there are lesions of cervical epithelium and HPV infection, and to deal with abnormalities in time.