There is also a point of menstruation is not to cohabit, menstruation is not completely over when the cervical opening is still in the open state, at this time if cohabit or bath, bacteria or viruses are easy to enter the uterine cavity along the cervical opening, causing endometritis, resulting in an increase in the amount of menstruation, prolongation of menstrual cycle, and in severe cases, there will be a significant abdominal pain. So during menstruation and less than 3 days after the end of menstruation, it is not recommended to have sex and tub baths, the end of menstruation when the body’s resistance has not been fully restored, is still in a relatively low state, at this time to have sex is likely to lead to the normal flora in the vagina is out of whack, which triggered the vaginitis. During menstruation, women should do a good job of menstrual care, change sanitary napkins, wash the vulva every night to keep the vulva clean and dry, usually recommended to wait for the complete end of menstruation 3 days before considering coitus, will not affect the health of the organism.