If your period is clean and comes back, consider ovulation bleeding or your period is not completely clean, just not bleeding for a while. If the menstrual period lasts for a long time, and when it is clean, it is close to ovulation, and there may be a small amount of bleeding from the uterus during ovulation, and then the menstrual period has just ended, and coitus is stimulated, which leads to bleeding because the uterine lining has not yet fully recovered. The above two kinds of bleeding, if it occurs occasionally, as long as the bleeding is not big and the bleeding time is short, it does not matter and does not need to be dealt with. If it occurs frequently, consider the influence of gynecological diseases, such as cervical erosion, endometriosis, etc. It is best to go to the hospital for examination. It is recommended to pay attention to maintain a good mood, avoid anxiety. Pay attention to perineal hygiene, pay attention to keep warm, do not eat cold and stimulating food.