The most common reason for the appearance of blood after coitus is due to chronic cervicitis resulting in localized erosion of the cervix, especially severe erosion, especially after sexual intercourse, penile stimulation of the local area as well as after strenuous exercise will lead to localized bleeding, resulting in the appearance of blood. The amount of bleeding is relatively small and can be relieved on its own without special treatment, but regular medical checkups are needed, mainly gynecological examinations as well as cervical exfoliative cell examinations, and even biopsies of the cervix and tests for the human papilloma virus. Due to reproductive system tumors, cervical cancer is the most common, often accompanied by other uncomfortable symptoms, such as vaginal fluid, abnormal leukorrhea and so on. It is necessary to improve the examination in time to clarify the specific causes. The occurrence of cervical cancer has a tendency to be younger, and most of the cases are treated by surgery at an early stage, the prognosis is better, and the survival time is also longer.