It is not allowed to have intercourse during menstruation, because intercourse during menstruation can easily induce the chance of infection, which can easily lead to chronic cervicitis, endometritis and pelvic inflammatory disease. You need to have sex 2-3 days after your period, because the cervical opening has completely closed and is no longer dilated. During menstruation, it is also necessary to pay attention to the need to eat too cold, spicy, stimulating food, because eating these will lead to increased menstrual flow and menstrual cramps, and pay attention to the warmth of the abdomen, to avoid catching a cold, resulting in menstrual cramps. Usually also need to keep the vulva clean, underwear should be changed often, especially during menstruation, to keep the local air permeability.