When menstruation has just ended, it is generally recommended to have intercourse only about 3 days after menstruation has cleared. If you have intercourse just after your period has ended, there may be more reasons for bleeding because the endometrium has not entered a resting period after it has completely shed its lining, so having intercourse, which causes excitation of the lining of the uterus, may cause a small amount of bleeding to occur. If the cervix and vaginal wall are stimulated too often during intercourse, this may cause bleeding. If the menstrual period has just ended, there may be some residual blood in the vagina, and intercourse at this time may also cause bleeding to occur. This usually ends in 3-7 days and does not last too long, so it is recommended to observe it. If there is still bleeding for more than 7 days, go to the hospital to review the ultrasound, and according to the situation need to take oral medication to stop bleeding.