Women should not have sex during their period. During menstruation, the cervix of a woman is slightly open. If you have intercourse during this period, men may bring pathogens into the vagina of a woman and the pathogens may be infected upstream. In addition, women’s resistance is poor during menstruation, so if they have intercourse, it may cause pelvic inflammatory disease. During menstruation women have constant vaginal bleeding, and in this case there is also a risk of infection in men. It is forbidden for women to have sex during their period, to take rest, to avoid strenuous exercise, to keep warm, not to get cold, to eat spicy and stimulating food, and to eat food that is too cold and too cold.