You should not have intercourse when you are still having your period, and you should not have intercourse with a condom. Because menstruation has not yet finished and the endometrium is still in the period of shedding, having intercourse at this time will cause excitement of the endometrium and accelerate the shedding of the endometrium, which will cause menstrual dripping; moreover, the uterine cavity and the fallopian tube are connected and will reach the pelvis through the endometrium of the fallopian tube, which will cause inflammation of the pelvis and the endometrium, and even chocolate cysts, which will This can cause undesirable consequences and may affect future pregnancies. Therefore, it is forbidden to have intercourse during menstruation, as far as possible, 2-3 days after the menstruation is clean, so as not to prematurely intercourse can also affect health, there will be some people with abdominal pain and high fever, for health, it is recommended that certain principles must be followed.