If there is blood after intercourse, it depends on the frequency of the occurrence to decide whether it is important or not. For example, if a little bit of blood after intercourse occurs only once, it is not important at this time because the vaginal wall is too tight or the male partner is too forceful when having intercourse, which stimulates the cervix including the vaginal wall causing blood vessel rupture, there will be a small amount of blood, usually it will be over in about 3-5 days and will not affect the health. However, it is important to have a little bit of blood frequently because bleeding during intercourse can occur when there is human papillomavirus infection, cervical erosion, cervical nuchal cyst, or even when there is vaginitis, including cervical canal polyps. Whenever possible, you should go to the hospital and register for a colposcopy in the gynecology department to rule out any diseases in this area, and you can undergo TCT and HPV cancer screening.