You can have intercourse when your period is about to come. As long as there is no vaginal bleeding and no bloody discharge is seen, you can have intercourse because as long as your period has not come, it means that the endometrium has not shed yet and intercourse at this time will not have a corresponding effect on the genitals. Once you find a small amount of bleeding, even if it is blood, do not have intercourse, indicating that the endometrium has begun to shed, if intercourse may cause retrograde infection of pathogenic bacteria, and lead to inflammatory reactions in the reproductive tract, so you should strictly control the time of intercourse. In addition, regardless of the time of intercourse, it is recommended to maintain the local hygiene of intercourse and strengthen the local care of vulva to reduce the inflammation. If your period is irregular, it is also recommended to take good contraceptive measures if you have intercourse when you are originally about to have your period, because this time may also be the time of ovulation.